सिद्ध कीजिए की:
` cos ( theta - 45^(@) ) =( sin theta + cos theta )/( sqrt(2))`

Cos (theta + 45^(@)) + Sin (theta - 45^(@)) =

Evaluate sin theta.cos theta , if sin theta + cos theta= sqrt2 .

If cos theta - sin theta = sqrt(2) sin theta " then " cos theta + sin theta =

Let P = {theta , sin theta - cos theta = sqrt(2)cos theta} and Q = {theta , sin theta + cos theta = sqrt(2) sin theta) be two sets. Then

Let P= {theta : sin theta - cos theta = sqrt2 cos theta} and Q = {theta : sin theta + cos theta = sqrt2 sin theta} be two sets. Then

(sin theta + cos theta)/(sin theta - cos theta) + (sin theta - cos theta)/(sin theta + cos theta)= ________

Solve sqrt(3) cos theta-3 sin theta =4 sin 2 theta cos 3 theta .

Solve sqrt(3) cos theta-3 sin theta =4 sin 2 theta cos 3 theta .