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

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 2beta is equal to

Find the value of f(alpha, beta) =|(cos (alpha + beta), -sin (alpha + beta), cos 2beta),(sin alpha, cos alpha, sin beta),(-cos alpha, sin alpha, cos beta)|

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)=

If alpha-beta=(2n+1)(pi)/2, n epsilon Z then [(cos^(2) alpha, cos alpha sin alpha),(cos alpha sin alpha, sin^(2)alpha)][(cos^(2) beta, cos beta sin beta),(cos beta sin beta, sin^(2) beta)]=

The value of the determinant Delta = |(cos (alpha + beta),- sin (alpha + beta),cos 2 beta),(sin alpha,cos alpha,sin beta),(- cos alpha,sin alpha,- cos beta)| , is