SOLUTION: Determine the general solution to the following equation in degrees, rounded to the nearest hundredth. 4 cos(15(x+30°))+1=−2

Question 1193099: Determine the general solution to the following equation in degrees, rounded to the nearest hundredth.
4 cos(15(x+30°))+1=−2
Found 3 solutions by MathLover1, Edwin McCravy, ikleyn:
Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

-> radians, convert to degrees:°
°
°
°
°
°

Answer by Edwin McCravy(20065)   (Show Source): You can put this solution on YOUR website!

The other tutor gave only one solution, not the general solution. Any integer multiple of 360^o positive, negative or 0 may be added to any angle without changing the value of any of its 6 trig ratios. So we add -360^{o:

,
when n is any integer.

Edwin}

Answer by ikleyn(52915)   (Show Source): You can put this solution on YOUR website!
.

For future generations of students who will read this post:

        - use the solution by Edwin, which is correct.

        - do not use / ignore the solution by @MathLover1, which is incorrect, since it is incomplete.

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