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QUESTION
Q
If sin Θ + cosec Θ = 2, then the value of sin9 Θ + cosec9 Θ is :
Solution
sin Θ + cosec Θ = 2
⇒ sin Θ + (1/sin Θ ) = 2 [since cosec Θ = 1/sin Θ]
⇒ sin2 Θ + 1 = 2 sin Θ
⇒ sin2 Θ +...
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Solution
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Keynote
cosec Θ = 1/sin Θ
(a − b)2 = a2 + b2 − 2ab
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