Question

Solve for x:

15>20sin((pi*x)/13)+2

Answer 1

\[15 > 20\sin \left( pi*x/13\right) +2\]

Answer 2

13 > 20sin(pi*x/13)
13/20 > sin(pi*x/13)
Sin oscillates, so there will be intervals of x that this inequality is true for. To see that, look at this graph.