If `sinalpha/a = cosalpha/b,` then `asin 2alpha + bcos 2alpha =`

If sin.alpha/2+cos.alpha/2=1.4, then: sinalpha=

IF (cosalpha)/a=(sinalpha)/b then a cos 2alpha+bsin 2 alpha =……….

If tantheta = (sinalpha-cosalpha)/(sinalpha+cosalpha), then (A) sin alpha-cos alpha=+-sqrt(2) sin theta (B) sinalpha+cosalpha=+-sqrt(2) cos theta (C) cos2theta=sin2alpha (D) sin2theta+cos2alpha=0

If sinalpha+cosalpha=p , then what is cos^(2)(2alpha) equal to ?

If F(alpha)=[[cosalpha, -sinalpha, 0], [sinalpha, cosalpha, 0], [0, 0, 1]] , where alphainR , then (F(alpha))^(-1)=

If A_(alpha)=[(cosalpha,-sinalpha),(sinalpha,cosalpha)] , then

If sinalpha+cosalpha=(1)/(5), find tan((alpha)/(2)).

if tan theta=(sinalpha-cosalpha)/(sinalpha+cosalpha) show that, sin alpha+cosalpha=pmsqrt(2)cos theta

If A=[{:(cosalpha,-sinalpha),(sinalpha,cosalpha):}] , then find the least value of alpha for which A+A'=I.

If A=[(cas alpha, sinalpha),(-sinalpha,cosalpha)], AA'=