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What is the value of tan18^(@) ?...

What is the value of `tan18^(@)` ?

A

`(sqrt5-1)/(sqrt(10+2sqrt5))`

B

`(sqrt5-1)/(sqrt(10+sqrt5))`

C

`(sqrt(10+2sqrt5))/(sqrt5-1)`

D

`(sqrt(10+sqrt5))/(sqrt5-1)`

Text Solution

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The correct Answer is:
A
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PUNEET DOGRA-TRIGONOMETRY-PREV YEAR QUESTIONS
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  3. What is the value of tan18^(@) ?

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  13. If x = sin 70^@. Sin50^@ and y=cos60^@ cos80^@, then what is xy equal ...

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  14. (1+cos.(pi)/(8))(1+cos.(3pi)/(8))(1+cos.(5pi)/(8))(1+cos.(7pi)/(8)) is...

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  15. If sin 18^@=(sqrt(5)-1)/4 then what is the value of sin 81^@

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  16. (1-tan2^(@)cot62^(@))/(tan152^(@)-cot88^(@)) =?

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  17. Consider the following statement : 1. If ABC is an equilateral trian...

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  18. If A=(cos150^@) and B=(sin60^@), then what is A/B equal to ?

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