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Question
त्रिकोणमितीय फलन cosec (-1410)° का मान ज्ञात कीजिए।
Sum
Solution
cosec (-1410) = -cosec 1410 [∵ cosec (-θ) = – cosec θ]
= – cosec (4 × 360 – 30)
= – cosec (-30)° [∵ cosec (360 + θ) = cosec θ]
= cosec 30° [∵ cosec (-θ) = cosec θ]
= 2 [∵ sin 30° = `1/2`]
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त्रिकोणमितीय फलन - त्रिकोणमितीय फलनों के चिह्न
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