arctan((tan(20))/(cos(10)))

解答

arctan (\frac{tan ( 2 0 ^{\circ} )}{cos ( 1 0 ^{\circ} )})

0.35401 \dots

求解步骤

arctan (\frac{tan ( 2 0 ^{\circ} )}{cos ( 1 0 ^{\circ} )})

整理为小数形式

= 0.35401 \dots

5 arcsin (1)

0.3 cos (4 1^{\circ})

2 \cdot arccos (\frac{1.5}{2})

150 tan (1 2^{\circ})

\frac{180}{π} arcsin (\frac{sin ( 53. 2 ^{\circ} ) \cdot 380}{508})