Question

pls explain question no 18 . in detail for class x cbse

Answer 1

GIVEN- cos ∅ - sin ∅ = √ 2 ∅ ________eq1

T.P-  cos theta + sin theta= under root 2 sin theta

LHS = cos ∅ - sin ∅___________eq2

FROM eq1    cos ∅= √ 2 sin ∅  + sin ∅

putting this value in eq2 we get

√ 2 sin ∅ + sin ∅- sin ∅

= √ 2 sin ∅= RHS

HENCE PROVED