Question: 15. cos - sin p 2 sin 2 a 4 16. sin a - sin a = cos - cost a tan 0 cot

15. cos - sin p 2 sin 2 a 4 16. sin

15. cos - sin p 2 sin 2 a 4 16. sin a - sin a = cos - cost a tan 0 cot t 17 = sin A tan A 18 +

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