If tan A = cot A then find cos A.
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then
cos A = sec A
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Answer:
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Given tan A+cot A=2
Squaring on both sides we get,
tan
2
A+cot
2
A+2tanAcotA=4
tan
2
A+cot
2
A+2=4
tan
2
A+cot
2
A=2
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