Question

sin thita + cos thita - sin square thita =​

Answer 1

let sin∅ + cos∅ - sin²∅ = x

squaring both sides,
x²= sin²∅ + cos²∅ + 2sin∅.cos∅ + sin⁴∅ - 2 sin³∅cos∅
x²=1 + 2 sin∅.cos∅ - 2 sin³∅.cos∅