Question

Simplify: (sin Θ − cos Θ)^2 − (sin Θ - cos Θ)^2

Answer 1

a^2-a^2=0

Answer 2

no trig needed.

Answer 3

since here both brackets are same & we are subtracting them so it becomes 0
You can use this formula to expand brackets
(a - b)^2 = a^2 - 2ab + b^2 , then simplify it

Answer 4

so you will get 0