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Question

Value of tan150 equals

A
2+3
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B
23
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C
32
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D
125
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Solution

The correct option is B 23
tan2(15)=2tan151tan215

tan15=x

13=2x1x2

x2+23x1=0

x=3±2
Therefore, tan15=23 , because tanθ is positive for θ=150

Ans: B

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