Question

(sin thetha - cos thetha) whole square = 1-2sin thetha • cos thetha​

Answer 1

see explanation

Explanation:

Using the identity

sin²x + cos²x = 1

Consider the left side

(sinθ - cosθ)² ← expand using FOIL

= sin²θ - 2sinθcosθ + cos²θ

= 1 - 2sinθcosθ

= right side , thus verified