Mark the Correct alternative in the following: If then b cos 2x + a sin 2x is equal to

Question

Philoid · Accepted Answer

Given

The value of the expression b cos 2x + a sin 2x

Now consider b cos 2x + a sin 2x

[ by using and ]

As already given

Then

= b

Hence b cos 2x + a sin 2x = b.

The answer is option B.