求解 tan215^circtan145^circ/tan305^circ+tan35=

$$\frac { \tan 215 ^ { \circ } \tan 145 ^ { \circ } } { \tan 305 ^ { \circ } + \tan 35 } =$$

求值

$$\frac{6128632457071275868842691978423}{9099255856655061250000000000000}\approx 0.673531172$$

求解步骤

对题中的三角函数求值

$$\frac{0.7002075382097092 \cdot -0.7002075382097102}{-1.4281480067421146 + 0.7002075382097097}$$

将 0.7002075382097092 与 -0.7002075382097102 相乘，得到 -0.49029059656570206950741535827384。

$$\frac{-0.49029059656570206950741535827384}{-1.4281480067421146+0.7002075382097097}$$

-1.4281480067421146 与 0.7002075382097097 相加，得到 -0.7279404685324049。

$$\frac{-0.49029059656570206950741535827384}{-0.7279404685324049}$$

将分子和分母同时乘以 100000000000000000000000000000000 以展开 \frac{-0.49029059656570206950741535827384}{-0.7279404685324049}。

$$\frac{-49029059656570206950741535827384}{-72794046853240490000000000000000}$$

通过求根和消去 -8，将分数 \frac{-49029059656570206950741535827384}{-72794046853240490000000000000000} 降低为最简分数。

$$\frac{6128632457071275868842691978423}{9099255856655061250000000000000}$$

因式分解

$$\frac{11 \cdot 19 \cdot 41 \cdot 16127 \cdot 12667271 \cdot 3501037691048551}{17 \cdot 5639 \cdot 75935498423 \cdot 2 ^ {13} \cdot 5 ^ {16}} = 0.673531171517601$$