If `tanAtanB=sqrt((a-b)/(a+b))` show that `(a-bcos2A)(a-bcos2B)=a^2-b^2`

If tan A tan B=sqrt((a-b)/(a+b)) show that (a-b cos2A)(a-b cos2B)=a^(2)-b^(2)

If tan A tan B=sqrt((a-b)/(a+b)), prove that (a-b cos2A)(a-b cos2B)=a^(2)-b^(2)

If tan theta tan phi=sqrt((a-b)/(a+b)) , prove that a-bcos 2theta)(a-b cos 2phi) is independent of theta and phi .

If 2(a^(2)+b^(2))=(a+b)^(2) then show that a=b

(a + sqrt b)(a-sqrt b) = a^2 - b

The value of (a+sqrt((a)-b^(2)))/(a-sqrt(a^(2)-b^(2)))+(a-sqrt(a^(2)-b^(2)))/(a+sqrt(a^(2)-b^(2)) is

If a,b,c are in G.P., then show that : (a^2-b^2)(b^2+c^2)=(b^2-c^2)(a^2+b^2)

If x=(sqrt(a+2b)-sqrt(a-2b))/(sqrt((a+2b))+sqrt((a-2b))) , show that bx^(2)-ax+b=0

If tantheta=(a)/(b) , then bcos2theta+asin2theta is equal to

In DeltaABC , prove that: (bcos^(2)C)/2+(c cos^(2)B)/2=s