Math, asked by sharanyachoudhury, 6 months ago

proof that cot π/8 - tan π/8 =2

Answers

Answered by dkchakrabarty01

1

Answer:

(1/tan22.5) - tan 22.5 (π/8=22.5)

=(1-tan22.5^2)/tan22.5

=2×(1-tan22.5^2)/(2×tan22.5)

=2×(1-tan22.5^2)/(tan22.5 + tan22.5)

=2/tan2×22.5

=2/tan45

=2 = RHS

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