Formula of Tan(2A)

Half Angle Formula of (tan A)/(2)(tan B)/(2)(tan C)/(2)

Formula for 2tan^(-1)x and 3tan^(-1)x

Formula for tan^(-1)(x)+-tan^(-1)(y)

Using the formula, tan 2A = (2tanA)/(1-tan^2A) , find the value of tan 60^@ , it being given that tan 30^@ =1/sqrt3

The formula "cos"^(-1)(1-x^(2))/(1+x^(2))=2tan^(-1)x holds only for :

The value of (1+tan^2A)/(1-tan^2A) is

In Delta ABC if tan((A)/(2))tan((B)/(2))+tan((B)/(2))tan((C)/(2))=(2)/(3) then a+c

The value of tan((5)/(2))^(@)tan((115)/(2))^(@)tan((125)/(2))^(@)=

If ABCD is a cyclic quadrilateral,the value of (tan(A)/(2)(tan)(C)/(2)+(tan)(B)/(2)(tan)(D)/(2) is