The expression `cos^2(alpha+beta)+cos^2(alpha-beta)-cos2alpha.cos2beta,` is (a)independent of `alpha` (b) independent of `beta` (c)independent of `alphaa n dbeta` (d)dependent on `alphaa n dbeta`

The expression cos^2(alpha+beta)+cos^2(alpha-beta)-cos2alphacos2beta is

If 3sinbeta=sin(2alpha+beta) then tan(alpha+beta)-2tanalpha is (a)independent of alpha (b)independent of beta (c)dependent of both alpha and beta (d)independent of both alpha and beta

The expression cos^(2)(alpha + beta + gamma) + cos^(2)(beta + gamma) + cos^(2)alpha - 2cos alpha cos(beta + gamma)cos(alpha + beta + gamma) is (a) independent of alpha (b) independent of beta (c) dependent on gamma only (d) dependent on alpha, beta, gamma

The expression (sin(alpha+theta)-"sin"(alpha-theta))/(cos(beta-theta)-cos(beta+theta)) is - independent of alpha b. independent of beta c. independent of theta d. independent of alpha\ a n d\ beta

If cos(alpha+beta)=0 then sin(alpha+2beta)=

Prove that : cos^2alpha+cos^2(alpha+beta)-2cosalphacosbetacos(alpha+beta)=sin^2beta

f(alpha,beta) = cos^2(alpha)+ cos^2(alpha+beta)- 2 cosalpha cosbeta cos(alpha+beta) is

Simplify 2sin^2beta+4cos(alpha+beta)sinalphasinbeta+cos2(alpha+beta)

Sum the series cosalpha+^nC_1 cos(alpha+beta)+^nC_2 cos (alpha+2beta)+…+cos(alpha+nbeta)

Prove that: cos2alpha\ cos2beta+sin^2(alpha-beta)-sin^2(alpha+beta)=cos2(alpha+beta) .