साबित करें कि `cos^(2) theta + sin^(2) theta cos 2beta = cos^(2) beta + sin^(2) beta cos 2 theta `

Prove that : cos^2 theta + sin^2 theta cos 2 beta = cos^2 beta + sin^2 beta cos 2theta

Prove that: cos^(2)theta+sin^(2)theta cos2 beta=cos^(2)beta+sin^(2)beta cos2 theta

cos^(2)theta+sin^(2)theta cos2 beta=cos^(2)beta+sin^(2)beta cos2 theta

If sin^(-1)x=theta+beta andsin ^(-1)y=theta-beta, then 1+xy is equal to sin^(2)theta+sin^(2)beta(b)sin^(2)theta+cos^(2)beta cos^(2)theta+cos^(2)theta(d)cos^(2)theta+sin^(2)beta

If theta is an angle given by cos theta = (cos ^(2) alpha + cos ^(2) beta + cos ^(2) gamma)/( sin ^(2) alpha + sin ^(2) beta + sin ^(2) gamma) where alpha, beta, gamma are the equal angles made by line with the positive directions of the axes, then the measure of theta is

If alpha + beta + gamma = 2 theta , " then " cos theta + cos ( theta - alpha ) + cos (theta - beta ) + cos ( theta - gamma ) =

If cos theta = cos alpha cos beta , " then " cot^(2)""(beta)/(2)=

If sin^(-1)x=theta+betaa n dsin^(-1)y=theta-beta, then 1+x y is equal to sin^2theta+sin^2beta (b) sin^2theta+cos^2beta cos^2theta+cos^2theta (d) cos^2theta+sin^2beta

If sin^(-1)x=theta+betaa n dsin^(-1)y=theta-beta, then 1+x y is equal to sin^2theta+sin^2beta (b) sin^2theta+cos^2beta cos^2theta+cos^2theta (d) cos^2theta+sin^2beta

Under rotation of axes through theta , x cosalpha + ysinalpha=P changes to Xcos beta + Y sin beta=P then . (a) cos beta = cos (alpha - theta) (b) cos alpha= cos( beta - theta) (c) sin beta = sin (alpha - theta) (d) sin alpha = sin ( beta - theta)