Question

how to find exact value of cos(Arcsin(5/13))

Answer 1

Draw a right triangle.
Label a side 5
Label the hypotenuse 13.

You should see it from that drawing.

Answer 2

cos= opposite over the hypotenuse

Answer 3

@Valerieeeee_8412 No, that would be the sine.

Answer 4

thats right, i meant adjacent over hypotenuse

Answer 5

Good call. But we must first designate an angle opposite the '5' and then calculate the length of the adjacent side.

Answer 6

Hint: \(\cos(\arcsin(x))=\sqrt{1-x^2}\).

Answer 7

thanks i used the triangle method. but ill just talk it over with my trig teacher tomorrow