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Evaluate: sin42º sin 48° - cos42° cos48°.
Evaluate: 3cos 80° cosec 10°+ 2cos 59° cosec 31°.
5
sec A
sin A cos A
sin A
sec A + tan A
cosec A + cot A
1 + sec A
cosec A + 1
Evaluate: sec2 18° - cot2 72°.
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