I'm trying to solve this trigonometric equation:
e := 4·cos(t)+2·cos(2·t)=0. In the interval 0..2·Pi
However when i try:
solve([e, 0 <= t <= 2 Pi], t, AllSolutions, explicit)
I won't give my a straight answer.
I have also given Student:-Calculus1:-Roots a try:
But it will only give me an answer when i use the numeric option. With I do not prefer.
How to I solve the equation without getting a float answer.