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Mathematics 24 Online
OpenStudy (anonymous):

find all values of 5cosθ + 1 = 0 for the interval 0<=θ<=2pi

OpenStudy (imstuck):

First thing to do is to treat this as you would a "regular" equation. Solve for theta by subtracting 1 from both sides.

OpenStudy (imstuck):

|dw:1410233001625:dw|

OpenStudy (imstuck):

Now divide by 5 to isolate the theta.

OpenStudy (anonymous):

this is as far as I got θ=cos^-1(1/5)

OpenStudy (imstuck):

|dw:1410233045352:dw|

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