Question

find value of A.
If tanA=cot (A-21)​

Answer 1

Answer:

Given: tan A = cot(A-21)

tan A = tan [90-(A-21)]

tan A = tan [90-A+21]

tan A = tan [ 111-A]

A = 111-A

2A = 111

A = 111/2 or 55.2

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