Cos x+y cosx cos x-y are in hp then (\frac{cosx\*secy}{2}) i... | Mathematics | SolveeIt | Solveeit

Today, August 18

Question

Cos x+y cosx cos x-y are in hp then $\frac{cosx*secy}{2}$ is

A

$\sqrt3$

B

$\sqrt2$

C

1

D

$\frac{1}{\sqrt2}$

Answer

$\sqrt2$

Explanation

Solution

The Correct option is(C): 2