Solve each trig functions with the angles 0 degrees <= x <= 360 degrees
1.) cos^2 theta + cos theta =2
2.) 3 - 4sin^2 theta =0
3.) 3cos^2 theta + 4sin^2 theta = 0
4.) cos^2 theta - sin^2 theta =0
5.) tan^2 theta + sec theta = 1
please help, i'm really confused ><
thanks in advance :)