If cotx coty=2 then prove that- cos(x+y)/cos(x-y) =1/3 - Maths - Trigonometric Functions

Question

If cotx coty=2 then prove that- cos(x+y)/cos(x-y) =1/3

Brijendra Pal · Accepted Answer

Hi,
Refer the almost same link:

https://www meritnation
com/ask-answer/question/if-cotacotb-2show-that-cos-a-b-cos-a-b-1-3/math/2646734

If cotx.coty=2 then prove that- cos(x+y)/cos(x-y) =1/3