Question

Determine the exact solution to the following in radians.

Answer 1

3sinx+1=sinx
2sinx+1=0
2sinx=-1
sinx=-1/2
x=sin^-1 (1/2) = 30 =
`\pi`/6 (when finding the inverse, always take the positive value, ignore the negative sign)
x is therefore negative in 3rd and 4th quadrant
Therefore values of x are:
180+30=210 = 7
`\pi`/6
360-3=330 = 11
`\pi`/6