[" 22.यदि "(If)sin varphi=x sin(2 theta+...

[" 22.यदि "(If)sin varphi=x sin(2 theta+varphi)" ,रारिता करे कि (prove that) "],[(x+y)cot(theta+varphi)=(y-x)cot theta]

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If y sinphi = x sin (2theta + phi) show that (x + y) cot (theta + phi) = (y-x) cot theta .

If 3 tan theta tan phi=1 , then prove that 2 cos (theta+varphi)=cos (theta-varphi) .

If y sin phi=x sin(2 theta+phi) show that (x+y)cot(theta+phi)=(y-x)cot theta

If 3tanthetatanvarphi=1 , then prove that 2cos(theta+varphi)=cos(theta-varphi) .

If t a n^2theta=2t a n^2varphi+1 , prove that cos2theta+ sin^2varphi=0.

If tan theta + tan phi = x "and" cot theta + cot phi = y, "prove that " cot ( theta + phi) = 1/x -1/y

if tan theta+tan phi=x and cot theta+cot phi=y prove that cot(theta+phi)=(1)/(x)-(1)/(y)

If t a n^2theta=2t a n^2varphi+1 , prove that cos2theta+sin^2phi =0.