[" 3.यदि "tan A=n tan B" और "sin A=m sin B," तो "],[cos^(2)A" का मान है "quad " [SSC (CGL) Mains "201" t "]

If tan A=n tan B and sin A=m sin B, prove that cos^(2)A=(m^(2)-1)/(n^(2)-1)

If tan A = n tan B and sin A = m sin B, prove that : cos^(2) A = (m^(2) - 1)/(n^(2) - 1)

If sin A=a cos B and cos A=b sin B then tan^(2)B =

If tan A = n tan B and sin A = m sin B , show that cos^(2)A= (m^(2)-1)/(n^(2)-1) .

If tanA=n tan B and sinA=m sin B, then the value of cos^2 A is यदि tanA=n tan B और sinA=m sin B, तो cos^2 A का मान है

(sin A + sin B) / (cos A + cos B) = tan ((A + B) / (2))

Prove that tan^2A - tan^2B = (sin(A+B).sin(A-B))/(cos^2A.cos^2B

If tan A=(1-cos B)/(sin B), then tan2A=tan B

Prove that (sin A-sin B)/(cos A+ cos B) = "tan" (A-B)/2

If sin A = m sin B, "prove that" "tan" (A-B)/2 = (m-1)/(m+1) "tan" (A+B)/2