Please help w/ 3sinx = 2,1; 2 + sinx = 0; cos^3x=0,512; cos^2x - 3sin^2x=0; cos^2x +

[SummerLove]

a) 3sinx = 2,1
b) 2 + sinx = 0
c) cos³x = 0,512
d) cos²x - 3sin²x = 0
e) cos²x + 3cosx = 0

 

[stapel]

a) 3sinx = 2,1
b) 2 + sinx = 0
c) cos³x = 0,512
d) cos²x - 3sin²x = 0
e) cos²x + 3cosx = 0

What were the instructions for these exercises? What have you tried? How far have you gotten? Where are you stuck?

Please be complete. Thank you!