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tan inverse(1-costhita/sinthita)=

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tan inverse(1-costhita/sinthita)=
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Leo Arockiasamy 5 years, 10 months ago

Tan^-1(1-cosx/sinx) =tan^-1(2sin^2x/2/2sinx/2cosx/2)=tan^-1(tan^x/2)=x/2
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