Trigonometric RatiosHard

Question

If (Sec A − Tan A) (Sec B − Tan B) (Sec C – Tan C) = (Sec A + Tan A) (Sec B + Tan B) (Sec C + Tan C), then every side is equal to -

Options

A.± 1
B.1
C.− 1
D.None of these

Solution

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