If `cot^2Acot^2B=3,` then the value of `(2-cos2A)(2-cos2B)` is ____

In a triangle ABC if b+c=3a then find the value of cot(B/2)cot(C/2)

If in A B C ,A C is double of A B , then the value of cot(A/2)cot((B-C)/2) is equal to 1/3 (b) -1/3 (c) 3 (d) 1/2

If x = a cosec θ, y = b cot θ, then the value of (x^2/a^2)−(y^2/b^2) = ………………..

If cos^(2)A+cos^(2)B+cos^(2)C=1 , then triangle ABC is

If tan A=1//2, tan B=1//3 , then prove that cos 2A=sin2B .

In triangle ABC the value of ( cot A/2 cot ""B/2 -1)/( cot""A/2 cot""B/2) is

The value of 2 sin A cos^(3)A-2 cos A sin^(3)A is …………

The area of an acute triangle ABC is Delta , the area of its pedal triangle is 'p' , where cos B=(2p)/(Delta) and sin B=(2sqrt(3)p)/(Delta) . The value of 8(cos^(2)A cos B+cos^(2)C) is