cos(2pi^{50})*(100)/pi

解答

cos (2 π^{50}) \cdot \frac{100}{π}

- 30.69925 \dots

求解步骤

cos (2 π^{50}) \frac{100}{π}

整理为小数形式

= - 30.69925 \dots

- cos (\frac{3 π}{4}) + cos (\frac{π}{2})

cos (3 0^{\circ}) sin (4 5^{\circ}) + sin (3 0^{\circ}) tan (3 0^{\circ})

sin (252 0^{\circ})

tan (arcsin (\frac{- 4}{5}))

\frac{sin ( 4 5 ^{\circ} ) + csc ^{2} ( 6 0 ^{\circ} )}{cos ( 3 0 ^{\circ} ) - tan ^{2} ( 4 5 ^{\circ} )}