Question

if tan2A=cot(A-18) find a​

Answer 1

Answer...

$\huge{A \:= \:36°}$

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Answer 2

Answer:

=》Tan 2A=COT(A-18°).

=》COT(90-2A)=COT(A-18°).

Here we have to compare the angles.

=》90-2A=A-18°.

=》90+18=A÷2A.

=》108=3A.

=》A=108/3.

=》A=36°.

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