cot t = - √3
cos t / sin t = - √3
cos t = - √3 sin t
cos t + √3 sin t = 0 /:2
1/2 cos t + √3/2 sin t = 0 ( we will use the additional formula )
sin 30° * cos t + cos 30° * sin t = 0
sin ( 30° + t ) = 0
30° + t = 0, t = - 30°
30° + t = 180° t = 150°
Answer:
t 1 = - π/6,
t 2 = 5π/6
