Question

Help pls i dont understand how to do this :')

Answer 1

Answer:

7/8

Step-by-step explanation:

Use the Pythagorean Identity

$( \sin(x) ) {}^{2} + ( \cos(x) ) {}^{2} = 1$

Plug in

$\frac{ \sqrt{15} }{8}$

for cos x.

$(\sin(x) ) {}^{2} + ( \frac{ \sqrt{15} }{8} ) {}^{2} = 1$

$( \sin(x) ) {}^{2} + \frac{15}{64} = 1$

$( \sin(x) ) {}^{2} = \frac{49}{64}$

$\sin(x) = \frac{7}{8}$