Math, asked by likhithavelaga, 4 months ago

range of cos^2A+cos^2(120-A) is

Answers

Answered by krishnendu100
0

Answer:

3/2p

Step-by-step explanation:

cos

2

A+cos

2

(120

+A)+cos

2

(120

−A)=cos

2

A+

2

1

(1+cos(240

+2A))+

2

1

(1+cos(240

−2A))

=cos

2

A+1+

2

1

(cos(240

+2A)+cos(240

−2A))

=1+cos

2

A+

2

1

(2cos240

cos2A)

=1+cos

2

A−

2

1

(2cos

2

A−1)

=1+

2

1

=

2

3

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