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QUESTION
Q
If tanA + cotA = 2, then the value of tan7A + cot7A is ?
Solution
Let tanA = a
Given tanA + cotA = 2
Therefore, a + 1/a = 2
a2 − 2a + 1 = 0
(a − 1)2 = 0
a...
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cotA = 1/tanA
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