拉动弹弓发射小鸟，让小鸟头上的三角函数式与猪头对应的等式答案匹配，即可消灭小猪！
sin(π/6) = 1/2
cos(π/3) = 1/2
tan(π/4) = 1
sin(π/3) = √3/2
arcsin(1/2) = π/6
arccos(1/2) = π/3
arctan(1) = π/4
arcsin(1) = π/2
还有小猪没被消灭。别忘了：先把小鸟上的式子算出来，再找答案相同的那只猪。