Question

prove that sin 3 theta cos3 theta by sin theta + cos theta= 1-sin theta cos theta

Answer 1

Answer:

Step-by-step explanation:

Sin³θ + Cos³θ / Sinθ + Cosθ

=> (Sinθ + Cosθ) ( Sin²θ + Cos²θ - SinθCosθ)/ Sinθ + Cosθ

=> Sin²θ + Cos²θ - SinθCosθ

=> 1 - SInθCosθ

= R.H.S

Hence Proved.