If `alpha\ &\ beta` satisfy the equation, `a cos2theta+b sin2theta=c` then prove that : `cos^2alpha+cos^2beta=(a^2+a c+b^2)/(a^2+b^2)`

If alpha, beta are the roots of the equation a cos theta + b sin theta = c , then prove that cos(alpha + beta) = (a^2 - b^2)/(a^2+b^2) .

If alpha "and " beta be two distinct real numbers such that (alpha-beta) ne 2 n pi for any integer n satisfying the equations a cos theta + b sin theta =c then prove that (i) "cos " (alpha+ beta) =(a^(2) -b^(2))/(a^(2) +b^(2)) " "(ii) "sin " (alpha + beta) = (2ab)/(a^(2)+b^(2))

If alpha and beta are the solution of a cos theta + b sin theta = c , then

If alpha and beta are the two different roots of equations a cos theta+b sin theta=c , prove that (a) tan (alpha+beta)=(2ab)/(a^(2)-b^(2)) (b) cos(alpha+beta)=(a^(2)-b^(2))/(a^(2)+b^(2))

If alphaa n dbeta are the solutions of acostheta+bsintheta=c , then show that "cos"(alpha+beta)=(a^2-b^2)/(a^2+b^2) (ii) cos(alpha-beta)=(2c^2-(a^2+b^2))/(a^2+b^2)

If alpha and beta are roots of the equation a cos theta + b sin theta = c , then find the value of tan (alpha + beta).

If alpha and beta are distinct roots of acostheta+b sintheta=c , prove that sin(alpha+beta)=(2a b)/(a^2+b^2)

If alpha and beta are 2 distinct roots of equation a cos theta + b sin theta = C then cos( alpha + beta ) =

If cos^2alpha-sin^2alpha=tan^2beta," then prove that "tan^2alpha=cos^2beta-sin^2beta .

If cosalpha+cosbeta=0=sinalpha+sinbeta , then prove that cos2alpha +cos2beta=-2cos(alpha +beta) .