Question

cosec square 48 degree minus tan square 42 degree = 1​

Answer 1

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Answer 2

$cosec ^{2} 48 - \tan^{2} 42 = 1$

cosec²(90°- 42°) - tan² 42° = 1

sec²42°- tan² 42° = 1

[sec² A - tan² A = 1]

Hence Proved