Question

if cos theta is -12/ 13 find cos 2 theta​

Answer 1

Answer:

Given cosθ=

13

5

We have to find sinθ

We know that, sinθ=

1−cos

2

θ

sinθ=

1−(

13

5

)

2

=

1−

169

25

=

169

169−25

=

169

144

=

13

12

∴sinθ=

13

12

Answer 2

Step-by-step explanation:

answer is attached in the above image