Question

Please please help me out

Answer 1

`(1)/(2)`

Explanation:

Using the Pythagorean identity

sin²x + cos²x = 1, then

cosx =
`√(1-sin^2x)`

note that (
`(√(3) )/(2)` )² =
`(3)/(4)`

cosΘ =
`\sqrt{1-(3)/(4) }` =
`\sqrt{(1)/(4) }` =
`(1)/(2)`

Answer 2

1/2

Explanation:

see the picture.