Show that: 2tan^-1{tan a/2 tan(pi/4 -b/2)=tan^-1(sin a cos b/cos a +sin b) - Maths - Inverse Trigonometric Functions

Question

Show that: 2tan^-1{tan a/2 tan(pi/4 -b/2)=tan^-1(sin a cos b/cos a
+sin b)

Varun.Rawat · Accepted Answer

Refer the following link :

https://www meritnation
com/ask-answer/question/show-that-2tan-1-tan-2-tan-4-2-t/inverse-trigonometric-functions/8824467

Show that: 2tan^-1{tan a/2.tan(pi/4 -b/2)=tan^-1(sin a.cos b/cos a +sin b)