arcsin((9sin(79))/(12))

解答

arcsin (\frac{9 sin ( 7 9 ^{\circ} )}{12})

0.82746 \dots

求解步骤

arcsin (\frac{9 sin ( 7 9 ^{\circ} )}{12})

整理为小数形式

= 0.82746 \dots

2 + cos (\frac{π}{6})

arctan (\frac{6}{4.5})

cot (arcsin (- \frac{5}{7}))

30 cos (9 0^{\circ})

cos (arctan (\frac{5}{7}) - arctan (\frac{1}{6}))