If `cos(theta+2 alpha) = m cos theta`, show that `cot alpha = (1+m)/(1-m) tan(theta +alpha)`

If cos (theta + 2alpha) = m cos theta , prove that : cot alpha = (1+m)/(1-m)tan(theta + alpha) .

If m cos(theta+alpha)=n cos(theta-alpha), then (m-n)cot alpha=

If m cos(theta+alpha)=n cos(theta-alpha), then (m-n)cot alpha=

If a* cos ( theta + alpha ) = b cos ( theta - alpha ) , " then " ( a+ b) tan theta =

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

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

Statement I : If m cos(theta+alpha)=n cos (theta-alpha) then tan theta.tan alpha=(m+n)/(m-n) Statement II : If (sin(alpha+beta))/(sin(alpha-beta))=(a+b)/(a-b) then tan alpha.cot beta=(a)/(b) Which of the above statements is correct ?

If cos (theta - alpha) , cos theta , cos (theta + alpha ) are in H.P. then cos theta .sec"" (alpha )/(2) =

if sin(theta+alpha)=cos(theta+alpha) then tan alpha

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