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If n is an integer, find the value of co...

If n is an integer, find the value of `cos [n pi + (-1)^(n) (pi)/6]`.

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The correct Answer is:
`(-1)^(n) cdot (sqrt3)/2`
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CHHAYA PUBLICATION-TRIGONOMETRIC RATIOS OF ASSOCIATED ANGLES-SAMPLE QUESTIONS FOR COMPETITIVE EXAMS - ASSERTION-REASON TYPE
  1. If n is an integer, find the value of cos [n pi + (-1)^(n) (pi)/6].

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  2. Find the value of tan75^@

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  3. Find the value of sin105^@

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