arctan(tan(-(3pi)/8))

解答

arctan (tan (- \frac{3 π}{8}))

- \frac{3 π}{8}

十进制

- 67.5

求解步骤

arctan (tan (- \frac{3 π}{8}))

Use the inverse trig property:

- \frac{3 π}{8}

arctan (tan (- \frac{3 π}{8}))

对于

- \frac{π}{2} < x < \frac{π}{2}, a rc t an (t an (x)) = x

- \frac{π}{2} < - \frac{3 π}{8} < \frac{π}{2}

= - \frac{3 π}{8}

= - \frac{3 π}{8}

csc^{2} (π)

sin (arcsin (\frac{5}{13}) + arccos (- \frac{4}{5}))

sec (34 5^{\circ})

arccos (sin (\frac{3 π}{4}))

cos (\frac{π}{9}) cos (\frac{2 π}{9}) - sin (\frac{π}{9}) sin (\frac{2 π}{9})