Question

if sin tita 20
/29 then find cosθ​

Answer 1

Answer:

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Answer 2

let @ is angle

sin@ = 20/29

here 20 is 20k perpendicular P and 29 is 29k Hypotenuse H

by Pythagoras theorem

H²= P²+B²

(29k)² = (20)² +B²

B² = 841k² -400k²

B² = 441 k²

B= √441 k

B=21 k

cos@ = B/H = 21k / 29k = 21/29