Math, asked by saniyakhan9687365066, 1 month ago

cos^2 pie/12 +cos^2 3pie/12 + cos^2 5pie/12​

Answers

Answered by ayeshaz4hid
0

Step-by-step explanation:

Solution

Correct option is

C

3/2

Solution:

cos

2

 

12

π

+cos

2

 

4

π

+cos

2

 

12

=cos

2

 

12

π

+cos

2

 

4

π

+cos

2

(

2

π

12

π

)

=cos

2

 

12

π

+cos

2

 

4

π

+sin

2

 

12

π

=cos

2

 

12

π

+sin

2

 

12

π

+cos

2

 

4

π

=1+(

2

1

)

2

=1+

2

1

=

2

3

Hence, C is the correct option.

Similar questions