Monday, 1 July 2019
TRIGONOMETRICAL IDENTITIES - PART - 30
59. cot
2
A [sec A – 1 / 1 + sin A] + cos
2
A [sin A -1 / 1 + sec A] = 0
60. [cot
2
A / (cosec A -1)] – 1 = cosec A
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