Question

Root 1-sin theta/1+sin theta = 1-sin theta/cos theta

Answer 1

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Answer 2

√1-sin/1+sin. multiply 1-sin both numerator and denominator

√1-sin×1-sin/1+sin×1-sin

√(1-sin)2/1-sin2

√(1-sin)2/cos2

1-sin/cos

hence proved