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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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