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

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

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

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

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

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

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

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

If tan theta = (x sin alpha + y sin beta)/(x cos alpha + y cos beta), "prove that " x sin (theta - alpha) + y sin (theta - beta) = 0

If tan theta = (Q sin alpha)/(P + Q cos alpha), "prove that", tan (alpha - theta) = (P sin alpha)/(Q + P 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