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

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 GM between sin alpha and cos alpha, then cos 2beta=

If sin beta is the GM between sin alpha and cos alpha, then cos 2beta=

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 2beta is equal to

(sinalpha cos beta+cos alpha sin beta)^2+(cos alpha cos beta-sin alpha sin beta)^2=1

Prove that (sin alpha cos beta + cos alpha sin beta) ^(2) + (cos alpha coa beta - sin alpha sin beta) ^(2) =1.

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)=