Question

Question #ea46a

Answer 1

See below

Explanation:

`2sin2x = 2cosx`

`sin2x = cosx`

We know, `sin2x = 2sinxcosx`

Put this value in above equation.

`2sinxcosx = cosx`

`2sinx = 1`

`sinx = 1/2`

Thus, x = 30°