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NCERT Class XI Mathematics - Trigonometric Functions - Solutions

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Question : 16
Total: 61
sin (−
11π
3
)
Solution:  
sin (−
11π
3
) = - sin (
11π
3
) [Since sin (– θ) = – sinθ]
= - sin (4π−
π
3
) = sin (
π
3
) =
√3
2
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