" 30.यदि (If) "tan x=(b)/(a)" ,सावित करे कि (Prove that) "a cos2x+b sin2x=a

If tan x = b/a, prove that a cos 2x + b sin 2x=a

If tan x=(b)/(a), prove that a cos2x+b sin2x=a

Prove that , (sin2x)/(1+cos2x)=tanx

Prove that: (sin2x)/(1+cos2x)=tanx

If tan x =b/a, then the value of (a cos 2x+ b sin 2x) is equal to-

(i) If "tan""(x)/(2)=(m)/(n) ,prove that m sin x+n cos x=n. (ii) If "tan" theta=(a)/(b) , prove that a sin 2theta+b cos 2theta=b .

If tan x=b/a , then the value of a cos 2x+b sin 2x is :

If tan x= (2b)/(a-c), a!=c, y = a cos^2 x +2b sin x*cos x + c sin^2x, z = a sin^2 x-2b sin x*cos x + c.cos^2x, then