prove that
cotπ/8-tanπ/8=2
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Step-by-step explanation:
cosπ/8/sinπ/8-sinπ/8/cosπ/8=
cos^2π/8-sin^2π/8/sinπ/8.cosπ/8=
2coπ/4/sinπ/4=
2cotπ/4=
2.1=2
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