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If (x-xtan^(2)15^(@))/(1+tan^(2)15^(@))...

If `(x-xtan^(2)15^(@))/(1+tan^(2)15^(@))=sin60^(@)+cos30^(@)`, then what is the value of x ?

A

2

B

`-1`

C

`-2`

D

1

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The correct Answer is:
A
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If (x-xtan^(2)30^(@))/(1+tan^(2)30^(@))=sin^(2)30^(@)+4cot^(2)45^(@)-sec^(2)60^(@) , then the value of x is :

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