Find all solutions in the interval 0° ≤ 𝜃 < 360°

Question

4 cos 𝜃 - 3 sec 𝜃 =0

Answer 1

plenty to take care of:

cos(x)=+/-√3/2

for just o to 360 degrees

have

x1=30

x2=-30 same as 330

x3=150

x4=-150 same as 210

so x can = 30, 150, 210, 330 degrees

Answer 2

sec θ = 1 / cos θ