Question

please answer me with proof it's urgent it's my ut​

Answer 1

Answer:

√(y² - x²)/y

Step-by-step explanation:

option (D)

Using formula,

sin²θ + cos²θ = 1

(x/y)² + cos²θ = 1

cos²θ = 1 - (x/y)²

cos²θ = (y² - x²)/y²

cosθ = √(y² - x²)/y