1.

Cosec2 (90°-0) - tan2 0= cos2 (90° - 0) + cos2 0​

Answer»

cosec²(90°-∅)-tan²∅ = cos²(90°-∅)+cos²∅

sec²∅-tan²∅ = sin²∅+ cos²∅

(1/cos²∅)- (sin²∅/cos²∅) = 1

(1+cos²∅)/(sin²∅) = 1

1+cos²∅= sin²∅



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