If cos(A - B) = `(3)/(5)` and tanA tanB = 2, then the value of cosA cosB is _____

If A + B =(pi)/(3) and cosA + cosB = 1then the value of cos ((A-B)/2) is_______

If cos(A-B)=3/5 and tanA tanB=2, then a.cos A cosB=1/5 b. cosA cos B= -1/5 c. sin A sin B= -1/5 d. sin A sin B= -1/5

If cos(A-B)=3//5andtanA.tanB=2, evalute : cosA.cosB.

In a triangle, tanA + tanB + tanC = 6 and tanA tanB = 2 , then the values of tanA, tanB, tanC are :

If angles A and B satisfy (1+tanA)(1+tanB)=2 , then the value of A +B is

If angles A and B satisfy (1+tanA)(1+tanB)=2 , then the value of A +B is

If sin(A-B) =1//2 and cos(A+B)=1//2 , then what is the value of sinA cosA + sin^2A sinB cosB +cos^3 A cosB tanA यदि sin(A-B) =1//2 तथा cos(A+B)=1//2 ,का तो मान sinA cosA + sin^2A sinB cosB +cos^3 A cosB tanA क्या है?

If 3tanA tanB=1 , then prove that 2cos(A+B)=cos(A-B)