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If tan 25^(circ)=x, then (tan 155^(circ)...

If tan `25^(circ)=x,` then `(tan 155^(circ)-tan 115^(circ))/(1+tan 155^(circ) . tan 115^(circ))=`

A

`(1+x^(2))/(2 x)`

B

`(1+x^(2))/(1-x^(2))`

C

`(1-x^(2))/(2 x)`

D

`(1-x^(2))/(1+x^(2))`

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HIMALAYA PUBLICATION-MEASUREMENT OF ANGLES, TRIGONOMETRIC RATIOS AND RELATION BETWEEN SIDES AND ANGLES OF A TRIANGLE-QUESTION BANK
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