Question

Need help quick please!

Answer 1

Answer: cos∅=
`(√(7) )/(4)`

Explanation:

All numbers are positive because it is first quadrant. Draw a line out.

sin = opp/hypotenuse. the opposite line of the angle (y) =3

and hypotenuse=4

use pythagorean theorem to find x

4²=3²+x²

`x=√(7)`

now use cos=adjacent/hypotenuse

cos∅=
`(√(7) )/(4)`