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if cos x= 3cos y then 2tan (y-x)/2 is equal to i want answer urgently

 
if cos x= 3cos y then 2tan (y-x)/2 is equal to 
i want answer urgently 
 
 
 

Grade:11

1 Answers

Aarushi Ahlawat
41 Points
3 years ago
There are infinite solutions between 0 and infinite. Note two solutions at extremes (1) when x=90o and y=90o and (2) when x=90o and y=270o. There are several solutions that satisfies cos(x)=3cos(y) and hence the 2tan ((y-x)/2). It looks like your question is incomplete or there are other constraints like x and y are within a specified domain.

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