Question

If Cos(x+y) = 0.5, find Sin (x+y)​

Answer 1

Step-by-step explanation:

$\sin(x + y) = \sqrt{1 - { \cos(x + y) }^{2} } = \sqrt{1 - {( \frac{1}{4} )}^{2} } = \frac{ \sqrt{15} }{16}$

I hope it will help you to understand the solution ☺️