- #1
Stickybees
- 36
- 0
Homework Statement
cos(4x)(6+2a)+12a+8b=-20 find values for a, b. Then check the values and state which values of x would not have been sufficient checks.
Homework Equations
Complex number equations
The Attempt at a Solution
I've simplified it down to this from a harder problem but I can't get any further, putting it into wolfram gives me a=-3 and b=2 but I have no idea how that was worked out.
Thanks in advance for any help!