Question

Given a right triangle ABC whose angle C = 90 and sin B= 2/3, find cos A

Answer 1

answere is below

Explanation:

if the angle is 2/3 that means its 36 degrees and 90 plus 36 or c+b= 126

a triangle has a total of 180 degrees so 180-126= 54 A=54 B=36 and C=90