[" 20.If "tan theta=(sin alpha-cos alpha)/(sin alpha+cos alpha)" then "sin alpha+cos alpha=],[" 1) "sqrt(2)cos theta" 2) "sqrt(2)sin theta" 3) "cos theta" 4) "sin theta]

If tan theta=(sin alpha-cos alpha)/(sin alpha+cos alpha) ,then theta is

underset is If tan theta=(sin alpha-cos alpha)/(sin alpha+cos alpha), then sin alpha+cos alpha

If tan theta=(sin alpha- cos alpha)/(sin alpha+cos alpha) , then sin alpha+cos alpha =.................... A) sqrt2 cos, theta sqrt2 sintheta B) -sqrt2 sin theta, -sqrt2 cos theta C) sqrt2 sin theta , sqrt2 sin theta D) sqrt2 cos theta , - sqrt2 cos theta

If tan theta=(sin alpha-cos alpha)/(sin alpha+cos alpha), prove that 2cos^(2)theta=1+sin2 alpha

If tan alpha=(sin theta-cos theta)/(sin theta+cos theta) then sin 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" " tan theta = (sin alpha - cos alpha)/(sin alpha + cos alpha),"prove that",2 cos^(2) theta = 1 + sin 2 alpha.

If (sin alpha-cosalpha)/(sin alpha+cosalpha)=tan theta , then prove that sin prop + cos prop = pm sqrt(2)cos theta.

If tan theta=(cos alpha-sin alpha)/(cos alpha+sin alpha) and theta is acute then theta+alpha=

If sin^(2)(theta-alpha)cos alpha=cos^(2)(theta-alpha)sin alpha=m sin alpha cos alpha, then