mong mn giúp em, em cần gấp
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1.she spends 20 minutes to draw a picture
2.Lan is the most creative in the group
3.No one is smaller than him
4.My pen isn't the same than mine
5.Lan is jealous than her
6.My brother no longer raise pets
-chúc bạn thật thông minh!!!!
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a: góc đối đỉnh với góc yOv là góc uOz
b: góc uOz=góc yOv
mà góc yOv=110 độ
nên góc uOz=110 độ
c; Ot là phân giác của góc uOz
=>góc uOt=1/2*góc uOz
=>x=1/2*110=55 độ
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1, Nam isn't so short as Hưng
2,Lan drives to work
3,How many fans are there in the classroom ?
4,It took 15 minutes
5,Unless she work hard ,giữ nguyên
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1 The distance from my home to school is about 3 km
2 My mum used to live in a small village when she was small
3 Despite being a millionaire , he lives in a small flat
4 when does the festive take place ?
5 It is about two kilometres from my home to school
6 he didn't use to ride his bike to school
7 Despite having a test tomrrow , they are still watching TV now
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Dạng 2:
a) \(\left(1-\cos\alpha\right)\left(1+\cos\alpha\right)=1-\cos^2\alpha=\sin^2\alpha\)
b) \(\sin\alpha-\sin\alpha\cdot\cos^2\alpha=\sin\alpha\left(1-\cos^2\alpha\right)=\sin^3\alpha\)
c) Ta có: \(\sin^4\alpha+\cos^4\alpha+2\cdot\sin^2\alpha\cdot\cos^2\alpha\)
\(=\left(\sin^2\alpha+\cos^2\alpha\right)^2\)
\(=1^2=1\)
d) Ta có: \(\tan^2\alpha-\sin^2\alpha\cdot\tan^2\alpha\)
\(=\tan^2\alpha\left(1-\sin^2\alpha\right)\)
\(=\tan^2\alpha\cdot\cos^2\alpha\)
\(=\dfrac{\sin^2\alpha}{\cos^2\alpha}\cdot\cos^2\alpha=\sin^2\alpha\)
Baif mấy bạn ơi ???