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IF tan theta 1 = k cot theta 2 , t...

IF ` tan theta _1 = k cot theta _2 ,` then `( cos ( theta _1+ theta _2))/(cos ( theta _1 - theta_2))`=

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
B
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