If cosA= 3/5,find 9cot×cot A-1
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Answer : CosA = 3/5
sinA = 4/5
cotA = 3/4
9 cot²A – 1 = 9(3/4)² – 1 = 9×9/16 – 1 = 65/16
Answer : CosA = 3/5
sinA = 4/5
cotA = 3/4
9 cot²A – 1 = 9(3/4)² – 1 = 9×9/16 – 1 = 65/16
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