Answer:

Explanation:
Given
given 'x' lies in

we know that sin(A+B) = sin A cos B + cos A sin B
=
.........................(1)
we will use trigonometry formulas


sin x is negative in third and fourth quadrant (
)
find sin x value
using trigonometry formulas


=



sin x =


in third and fourth quadrant is negative so sin x=

now equation (1), we get solution

=
