-
Learn General Se
cretary on
o to learn
a
ngthe
ning
ousnesses
nt
spe
ech ca
used a
strong rea
ction in the
countr
y.
ime,
watching
origin
of
buil
ding t
he party
ba
ck to
powe
r,
how to stre
ngthe
n
servi
ces for the masses,
impr
ove party cohe
sion,
fighting to become t
he
grass
-roots party members
a
nd masses
hot topic.
Gra
ss
-roots
party
organi
zations
ngthen
t
he servi
ce of party members
and ca
dres, the
pioneer
spirit. Di
stribution
of
grass-r
oots
party organizati
ons in all
walk
s of pe
ople,
clot
hing,
shelte
r, whi
ch
belongs to t
he
ner
ve endi
ngs of the
party organizati
on
a
nd
comments
re
putati
on has a
dire
ct per
cepti
on
of the masses.
Strengthen the party
a
head
of the
l
ngthe
n the party
members and ca
dres
ss does
not have t
o be
me
spirit to set the party's positive
image among the
people is
im
portant.
Grass
-root
s party
organi
zations
people not
ha
ppy not to se
e
s
honest faithful,
diligent faith for the
pe
ople. No
nee
d
to avoi
d mentioning t
hat,
some members of our party ca
n not stand
the
on
of temptation,
t
hin,
Xu Zhou, such
a
buse and corrupt
bribery,
malfeasa
nce
borers, and
rats. Two, is to
clean
up,
t
hin,
Xu, Z
hou's
soluti
on to rest
ore the
party's fresh a
nd natural,
solid a
nd
honest work
styl
e.
Cleansing
card,
sirable a
nd
behavi
our,
d and
cold,
push
-roots party
orga
nizations
strengthe
n the
sense of or
dinary party
members, parti
cipati
ng in
consci
ousness, unity
c
onsciousness. For reasons
k
now
n, members
of
grass-r
oots
party
branche
s less
m
obil
e, less
re
sources,
and
t
he constructi
on
of party organizati
ons have
some lag. Two
studies, is t
o
focus on the grass-roots party
branches
oose, soft,
loose
probl
em, advance the
party members and ca
dres,
orking
Strong cleanup
acti
ons, styl
and
rambli
ng,
pre
sumpt
uous
d
s special
attenti
on to
party members
a
nd ca
dres
ning
party of
thought
ng
ned i
n
the l
ong
-term development of
our party's
histori
cal
experi
ence accumul
ated. Two
i
s our party under the new
hist
ori
cal
conditions, stre
ngthe
n the
party's constr
uction of a
ne
w
oots party
organizati
ons
shoul
d always
cat
ch the
hard
w
ork, results-oriente
d.
Two educational outcome
s are
long
-term orie
nted and
become a
n important impetus for the
w
ork.
d have
thre
e kinds
of
consci
ousne
ss
sic
lear
ning lie
s in the
doi
ng. Only the
Constituti
on address
t
he serie
s of party
rule
s, and do soli
d work,
be qualified
party members
ha
d a solid ideol
ogical
basis. Only the
ng
y, to form a
earn-do-do
ctive of
education. T
his requires that
t
he Organization
（
1
）特殊角三角函数值
sin0=0
sin30=0.5
sin45=0.7071
二分之根号
2
sin60=0.8660
二分之根号
3
sin90=1
cos0=1
cos30=0.
二分之根号
3
cos45=0.
二分之根号
2
cos60=0.5
cos90=0
tan0=0
tan30=0.
三分之根号
3
tan45=1
tan60=1.
根号
3
tan90=
无
cot0=
无
cot30=1.
根号
3
cot45=1
cot60=0.
三分之根号
3
cot90=0
（
2
）0°～90°的任意角的三角函数值，查三角函数表。（见下）
earning e
ducation,
ne
ed thre
e kinds of
consci
ousness: one i
s to
esta
blish
an
integrate
d awarene
ss.
Learni
ng
car
isTw
o-w
heel,
bird
w
ings,
nee
d to go
hand in
hand,
one
e
nd
can
be
neglecte
d. Communi
st
the
oreticia
n and man.
Only
by cl
osely
combi
ning t
heory
a
nd
practi
ce
together in order to truly reali
ze
their val
ue.
ng
oundation is
not str
ong,
shaki
ng;
net to
net thousa
nds of accounts.
s, goi
ng to
he
ng
back to
standard, so that t
he
majori
ty of party members
ning theory of
nutrie
nts, in t
he
ce party's purposes. S
econd,
to esta
blish a se
nse
of dept
h.
ning
drawn,
entirely
different, but
t
he orga
nic
unity
of the whole.
ning
e
ducation, we
need
t
o explor
e
integr
ating
bit
ence
he
ng
simple room
instr
ucti
on,
onotone for
doing.
Should ex
ploration
he ha
s
on
a
nd pra
ctice
of
carrier, makes general grass-roots
member
s can i
n
he
ha
s
s se
nse,
i
n
he ha
s
of theory
brain
int
o heart,
put for people
servi
ce concept
outsi
de of Yu
sha
ped. T
hird,
t
o adhere to
l
ong
-term the
aware
ness. Style construction on the
r
oad forever,
catch the
long-term.
o
nd
e
ducation, by no means,
assa
ult-style
wind-sport,
but t
he recurrent
e
ducati
on
within
t
he part
y. In
rece
nt years, t
he party's
mass line e
ducation practi
ce
a
nd
-three
cial
educati
on i
n
grass-r
oots
bor
ne
rich fruits, vast number
s of party
members a
nd
cadres
withst
ood t
he
baptism of the
spirit.
o
er hol
d long-
term, to e
stablish and perfect the
effective mechani
sm of the education,
focusing
on t
he
creati
on of
l
ong
-term education, strive
to make the vast
number of party
members t
o
maintain their
va
nguard
Col
or,
maintai
n the
party's
adva
nce
d nature
a
nd
purit
y. Aware
ne
ss
-raising
,
antennas a
nd atmosphere
a
di
scussi
on
on how
lea
ding ca
dres
of
party members
nt,
up
a
nd
dow
n the
country,
party cadre
s as a
h a barometer and impetus.
The
ng enoug
h
dee
p, is to
determine
t
he party ca
dres can resolve
to study har
d first. In the
o
oce
ss, some
ca
dres of himse
lf, standing
l
ong,
high
awar
eness, that Constitution Party
rule
s is simpl
e, its not
worth
bothering some party
ca
dres thi
nk
spea
k series ha
s
not
hing to
do
wit
h the grass
-roots
work
, water busine
ss
lear
ning seri
es of speeches
seen a
s window
dressi
ng.
These
nd deca
dent
s
learni
ng lacks m
otivation, a
serious impe
diment to
ill once sa
id,
only a ba
sic
el
ement of human thoug
ht
patterns change
dramaticall
y,
h
uman de
stiny ca
n
make great improvement. T
he same,
only party members and
Learn
General Se
cretary on
o to
learn a
ngthe
ning
ousnesses
nt
spe
ech ca
used a
strong rea
ction in the
countr
y.
ime,
watching
origin
of
buil
ding t
he party
ba
ck to
powe
r,
how to stre
ngthe
n
servi
ces for the masses,
impr
ove party cohe
sion,
fighting to become t
he
grass
-roots party members
a
nd masses
hot topic.
Gra
ss-roots
party
organi
zations
ngthen
t
he servi
ce of party members
and ca
dres, the
pioneer
spirit. Di
stribution
of
grass-r
oots
party organizati
ons in all
walk
s of pe
ople,
clot
hing,
shelte
r, whi
ch
belongs to t
he
ner
ve endi
ngs of the
party organizati
on
a
nd
comments
re
putati
on has a
dire
ct per
cepti
on
of the masses.
Strengthen the party
a
head
of the
l
ngthe
n the party
members and ca
dres
ss does
not have t
o be
me
d
spirit to set the
party's positive image among the
people
is im
portant.
Grass
-root
s party
organi
zations
people not
ha
ppy not to se
e
s
honest faithful,
diligent faith for the
pe
ople. No
nee
d
to avoi
d mentioning t
hat,
some members of our party ca
n not stand
the
on
of temptation,
t
hin,
Xu Zhou, such
a
buse and corrupt
bribery,
malfeasa
nce
borers, and
rats. Two, is to
clean
up,
t
hin,
Xu, Z
hou's
soluti
on to rest
ore the
party's fresh a
nd natural,
solid a
nd
honest work
styl
e.
Cleansing
card,
sirable a
nd
behavi
our,
d and
cold,
push
-roots party
orga
nizations
strengthe
n the
sense of or
dinary party
members, parti
cipati
ng in
consci
ousness, unity consciousness. For
reasons k
now
n, members
of grass-r
oots
party branche
s less
m
obil
e, less
re
sources,
and
t
he constructi
on
of party organizati
ons have
some lag. Two
studies, is t
o
focus on the grass-roots party
branches
oose, soft,
loose
probl
em, advance the
party members and ca
dres,
orking
Strong cleanup
acti
ons, styl
and
rambli
ng,
pre
sumpt
uous
d
s special
attenti
on to
party members
a
nd ca
dres
ning
party of
thought
ng
ned i
n
the l
ong
-term development of
our party's
histori
cal
experi
ence accumul
ated. Two
i
s our party under the new
histori
cal conditions,
stre
ngthe
n the
party's constr
uction of a
ne
w
oots party
organizati
ons
shoul
d always
cat
ch the
hard
w
ork, results-oriente
d.
Two educational outcome
s are
long
-term orie
nted and
become a
n important impetus for the
w
ork.
d have
thre
e kinds
of
consci
ousne
ss
sic
lear
ning lie
s in the
doi
ng. Only the
Constituti
on address
t
he serie
s of party
rule
s, and do soli
d work,
be qualified
party members
ha
d a solid ideol
ogical
basis. Only the
ng
y, to form a
earn-do-do
ctive of
education. T
his requires that
t
he Organization
（
3
）锐角三角函数值的变化情况
（
i
）锐角三角函数值都是正值
（
ii<
/p>
）当角度在
0°～90°间变化时，
正弦值随着角度的增大（或减小）而增大（或减小）
余弦值随着角度的增大（或减小）而减小（或增大）
正切值随着角度的增大（或减小）而增大（或减小）
余切值随着角度的增大（或减小）而减小（或增大）
（
iii
）当角度在
0°≤
α
< br>≤90°间变化时，
0≤sin
α
≤1, 1≥
cos
α
≥0,
当角度在
0°<
α
<90°间变化时，
tan
α
>0,
cot
α
>0.
“锐角三角函数”
属于三角学，
是
《数学课程标准》
中
“空间与图形”
领域的重要内容。
从《数学课程标准》
看，中学数学把三角学内容分成两个部分，
第一部分放在义务教育第
三
学段，
第二部分放在高中阶段。
在义
务教育第三学段，
主要研究锐角三角函数和解直角三角
形的内容
，本套教科书安排了一章的内容，就是本章“锐角三角函数”。在高中阶段的三角
内容是
三角学的主体部分，包括解斜三角形、
三角函数、
反三角函数和
简单的三角方程。无
论是从内容上看，
还是从思考问题的方法上
看，
前一部分都是后一部分的重要基础，
掌握锐
角三角函数的概念和解直角三角形的方法，是学习三角函数和解斜三角形的重要准备。
< br>
附：三角函数值表
sin0=0,
sin15=
（√6
-
√2)/4 ,
sin30=1/2,
sin45=√2/2,
sin60=√3/2,
sin75=(√6+√2)/2 ,
sin90=1,
sin105=√2/2*(√3/2+1/2)
sin120=√3/2
earning
e
ducation, ne
ed
thre
e kinds of
consci
ousness: one i
s to
esta
blish
an
integrate
d awarene
ss.
Learni
ng
car
isTw
o-w
heel,
bird
w
ings,
nee
d to go
hand in
hand,
one
e
nd
can
be
neglecte
d. Communi
st
the
oreticia
n and man.
Only
by cl
osely
combi
ning t
heory
a
nd
practi
ce
together in order to truly reali
ze
their val
ue.
ng
oundation is
not str
ong,
shaki
ng;
net to
net thousa
nds of accounts.
s, goi
ng to
he
ng
back to
standard, so that t
he
majori
ty of party members
ning theory of
nutrie
nts, in t
he
ce party's purposes. S
econd,
to esta
blish a se
nse
of dept
h.
ning
drawn,
entirely
different, but
t
he orga
nic
unity
of the whole.
ning
e
ducation, we
need
t
o explor
e integrating
bit
ence
he
ng
simple room
instr
ucti
on,
onotone for
doing.
Should ex
ploration
he ha
s
on
a
nd pra
ctice
of
carrier, makes general grass-roots
member
s can i
n
he
ha
s
s se
nse,
i
n
he ha
s
of theory
brain
int
o heart,
put for people
servi
ce concept
outsi
de of Yu
sha
ped. T
hird,
t
o adhere to
l
ong
-term the
aware
ness. Style construction on the
r
oad forever,
catch the
long-term.
o
nd
e
ducation, by no means,
assa
ult-style
wind-sport,
but t
he recurrent
e
ducati
on
within
t
he part
y. In
rece
nt years, t
he party's
mass line e
ducation practi
ce
a
nd
-three
cial
educati
on i
n
grass-r
oots
bor
ne
rich fruits, vast number
s of party
members a
nd
cadres
withst
ood t
he
baptism of the
spirit.
o
er hol
d long-
term, to e
stablish and perfect the
effective mechani
sm of the education,
focusing
on t
he
creati
on of
l
ong
-term education, strive
to make the vast
number of party
members t
o
maintain their
va
nguard
Col
or,
maintai
n the
party's
adva
nce
d nature
a
nd
purit
y. Aware
ne
ss
-raising
,
antennas a
nd atmosphere
a
di
scussi
on
on how
lea
ding ca
dres
of
party members
nt,
up
a
nd
dow
n the
country,
party cadre
s as a
h a barometer and impetus.
The
ng
en
oug
h dee
p, is
to
determine t
he party
ca
dres can resolve to study
har
d first. In the
o
oce
ss, some
ca
dres of himse
lf, standing
l
ong,
high
awar
eness, that Constitution Party
rule
s is simpl
e, its not
worth
bothering some party
ca
dres thi
nk
spea
k
series ha
s
not
hing to
do
wit
h the grass
-roots
work
, water busine
ss
lear
ning seri
es of speeches
seen a
s window
dressi
ng.
These
nd deca
dent
s
learni
ng lacks m
otivation, a
serious impe
diment to
ill once sa
id,
only a ba
sic
el
ement of human thoug
ht
patterns change
dramaticall
y, human
de
stiny ca
n make great
improvement. T
he same,
only
p
arty members and