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If (cos(x-y))/(cos(x+y))+(cos(z+t))/(co...

If `(cos(x-y))/(cos(x+y))+(cos(z+t))/(cos(z-t))=0` then the value of tan x tan y tan x tan t is equal to

A

1

B

`-1`

C

2

D

`-2`

Text Solution

Verified by Experts

The correct Answer is:
B
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