" If "sin beta" is the G.M.between "sin alpha" and "cos alpha" then "cos2p

If sin beta is the G.M.between sin alpha and cos alpha, then cos2 beta=?

If sin beta is the G.M between sin alpha and cos alpha then (cos alpha - sin alpha)^(2) - 2 cos^(2) beta =

If sin beta is the G.M between sin alpha and cos alpha , then cos 2 beta is

If sin beta is the GM.between sin alpha and cos alpha then (cos alpha-sin alpha)^(2)-2cos^(2)beta=1)02:)13 24)-1

If sin beta is the GM between sin alpha and cos alpha then (cos alpha-sin alpha)^(2)-2(cos beta)^(2)=

If x cos alpha + y sin alpha = x cos beta + y sin beta "then" (sin alpha - cos alpha - sin beta + cos beta)/(sin alpha + cos alpha - sin beta - cos beta)=

Evaluate |[cos alpha cos beta, cos alpha sin beta, -sin alpha],[ -sin beta, cos beta, 0],[ sin alpha cos beta, sin alpha sin beta, cos alpha]|

(i) sin (alpha + beta) = sin alpha cos beta + cos alpha sin beta) (ii) sin (alpha-beta)= sin alpha cos beta- cos alpha sin beta Proof

If ( cos x - cos alpha)/(cos x - cos beta) = ( sin^2 alpha cos beta)/(sin^2 beta cos alpha) then cos x =

If ( cos x - cos alpha)/(cos x - cos beta) = ( sin^2 alpha cos beta)/(sin^2 beta cos alpha) then cos x =