Question

sinx=-1 cosx=0 tanx=1求(0,2π )内的角x 还有一个条件是sinx=负的二分之根号三

Answer 1

sinx=-1

x=3π/2

cosx=0

x=π/2,x=3π/2

tanx=1

x=π/4,x=5π/4

sinx=负的二分之根号三

x=4π/3,x=5π/3