Question

Find the value of tan15°​

Answer 1

tan15=tan(45-30)

=tan45 - tan30/1+tan45.tan30

=(1- 1/root(3))/1 + 1/root(3)

=root(3) -1/root(3)+1

Identity used :

tan(A-B)=tanA-tanB/1+tanA.tanB

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