Question

sin(π+theta)sin(π-theta)cosec^2theta = ?​

Answer 1

Answer:

$sin( \pi + \theta)sin( \pi - \theta) {cosec}^{2} \theta \\ = - sin\theta \times sin\theta \times {cosec}^{2} \theta \\ = - {sin}^{2} \theta \times {cosec}^{2} \theta \\ = - {sin}^{2} \theta \times \frac{1}{{sin}^{2} \theta} \: \\ = - 1$

Answer 2

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