If `alpha in Q_4 and sinalpha/2+cosalpha/2=- 1/2 `then ` sin2alpha=`

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

If alpha in Q_(4) and sin((alpha)/(2))+cos((alpha)/(2))=-(1)/(2) then sin2 alpha=

If alpha in Q_(4) and "sin" (alpha)/(2) + "cos" (alpha)/(2) = (-1)/(2) "then sin 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=(1)/(5), find tan((alpha)/(2)).

(a+2)sinalpha+(2a-1)cosalpha=(2a+1)iftan alpha is

If alpha is any real number, then : (sinalpha+cosecalpha)^2+(cosalpha+secalpha)^2-(tan^2alpha+cot^2alpha)=....

If tantheta=(sin alpha-cos alpha)/(sinalpha+cosalpha)1 then

If A= [[cosalpha,sinalpha],[-sinalpha,cosalpha]] then show that A^2=[[cos2alpha,sin2alpha],[-sin2alpha,cos2alpha]]