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(共33张PPT)
教 室
认 识 教 室
Know about
门
门
门
门
门
开门
关门
窗户
窗户
窗户
窗户
窗户
开窗
开窗
介绍自己的教室
This is _____.
Homework
视频打卡，介绍自己家里的门和窗，并情景演绎开门关门，开窗关窗。
Period2
教 室
门
This is the____.
door
窗户
This is the_____.
window
教室里面会有什么？
What's in the classroom
黑板
This is _________.
the blackboard
书桌
椅子
black
win
dow
door
desk
chair
可以自编chant节奏读出单词。
board
window
door
blackboard
desk
chair
Let’s design a classroom.
This is my...
og b'=rlog b
cosa-cosB=-2sin
2cosa=1+cos 20
0+B
tg(o-B)
=1+co2+B
c●β
(sin
tgo+tgB
loga b =rloga b
1+t ot
coso-cosβ=-2sinY
sin
sin
tg(+B)=
2
1-tgotgB
ctga+1=
=cosec2o sina-sinB=2sin Bcos+B
2
2
(sin x +cos x)
=1+sin 2x
cos(a+β)=cos a.cosβ-sin o sin B
sin-o
(sin x-cosx)2=1-sin 2x
f'(X)·g(x)-f(x)·g(x)
S
(p-c
pr
2
tg20=
tgx=a;X=arctga+元n
b =loga b-loga
0+B
0-B
8(x)
sin 20=2 sin o cos o
1-tg0
sin o+sin B=2sin
cos
2
2
cos 2a=cos2 a-sin2 a
e=1++
+司271
cos 20 1-2 sin o
+B
loge b
sec2
f(X+△X)-f(x
cos&+cos
2cos
loga b=
a
●osp0
(X)=
lim
arccos(-a)=-arccos a
logc a
sin(a-B)
sin o cos B.
tgactgo =1
arctg(-a)=-arctga
-cos osin Farcsin(-a)=-aresina
X0
△X
2R
sin o sin B
C0S20=2c0s20-1
log b-1logb
2sin asin B=cos(a-B)-
cos(a+B)
sin x a;x =(-1)"arcsina+n,
sin2 a+cos2 a =1
tgo+tgβ
g0-tg
tg(o+B)
2w8”l&+sinB
1-tgotgB
2sin20=1
cos 20
cos (a+B)=cos a cos B-sin asin
loga b"=rloga b
log.
+t ot
coso-cosβ=-2sin-
cosec2o sina-sinB=2sinBcosB
2
f (
f(x)·g(K)
(x)g(x)
(sin x+cos x)2=1+sin 2x
(sin x-cos x)=1-sin2x
b=log,b-1og(x)
S=1p(p-a)(p-b)(p-c)=pr
g(x
sin 20=2 sin o cos o
(sin x
tgx a;x arctga+n
cos 20.cos2 a-sin2 o
sina+sin B=2sinBcos-B
tg0+1=
sec-a
(X+△X)一（
2
2
cos 20 1 -2 sin2 o
cos2 a
0+
loga b
loge b
tgactgo =1
cosB=2cos
6
logc a
2R
sino sinsiny
c0s20=2c0s20-
loga b=-log
sin(o-B)=sin ocosB
sin x a;x =(-1)"
sin(-a)=-arcsin a
arct
arctga
go-
2sin asin B=cos(a-B)
2os2a=1+cos28+
loga b'=rloga b
cosa-cosB=-2sin
loga b'=rloga
cosq-cosp

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