300*cos(20)

解答

300 \cdot cos (2 0^{\circ})

281.90778 \dots

求解步骤

300 cos (2 0^{\circ})

整理为小数形式

= 281.90778 \dots

tan^{2} (4 5^{\circ} - \frac{15.61}{2})

(sin (3 0^{\circ}) + cot (6 0^{\circ})) (tan (6 0^{\circ}))

sin (3 0^{\circ}) cos (6 0^{\circ}) - sin (6 0^{\circ}) cos (3 0^{\circ})

cos (2 π - \frac{π}{4})

arcsin (0.9779)