Question

Is Sin A=3/5 the Cos A=?​

Answer 1

Answer:

Given, sinA = 3/5

we know, cos²A = 1 - sin²A

=> cos²A = 1 - ( 3/5 )²

=> cos²A = 1 - 9/25

=> cos²A = ( 25 - 9 )/25

=> cos²A = 16/25

=> cosA = √(16/25)

=> cosA = 4/5