Q .     If `tan alpha = k cot beta`, then ` ( cos ( alpha - beta))/( cos ( alpha + beta))` is equal to

UPSEE 2009
A

` (1 + k)/(1-k)`

B

` (1 - k)/(1+k)`

C

`(k+1)/(k-1)`

D

`(k-1)/(k+1)`

0
Success Rate: NAN %
Sr. No.SubjectTagCorrectRecorded Answer