If sin θ is the geometric mean between sin ϕ and cos ϕ, then cos 2θ is equal to
Answers
Answered by
0
us wthe formula of cos 2theta.
Attachments:
![](https://hi-static.z-dn.net/files/d52/5155825b4be01296b4773684aa3ed7bc.jpg)
Similar questions