If tan^-1 (sin^2theta - 2 m sintheta + 3...

If `tan^-1 (sin^2theta - 2 m sintheta + 3m^2)` + `cot^-1(5^(sec^2y) + m^3)` =`pi/2` and m be the least value of`(1 + sec^-1 t) (1 + cos^-1t),` then the value of(` |cos theta| - sin theta`) is equal to`(1)m/2 (2)m (3)2m (4) m/4`

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