Math, asked by aryankhirwar8, 11 months ago

[ cosec^2(90-€) - 1 ] × [ 1/sin^2€ - 2 ]

Answers

Answered by wwwswayamag22

0

Answer:

cosec²(90-€)= sec2€

1/sin2€-2 = 1-2sin²€/sin²€

so,

sec²€ -1 × 1-2sin²€/sin²€

= tan²€× cos2€/sin²€

= cos 2€/cos²€

1-2cos²€/cos²€

= sec²€ -2

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