If Cos A=15/17 and Sin B=24/25,where A is reflex and B is obtuse.

Question

Find the value of Cot(A-B)? 

 

Answer 1

A is reflex means A is in fourth quadrant .

B is obtuse means B is in second quadrant.

From pythagorean theorem

Since cot(A) is negitive on fourth quadrant .

Since cot(B) is negitive on second quadrant .

Apply compound angle formula