How do I solve this equation?

13.5=3.1sin(360/365(x-79.95)+12.18

1 answer

the same way you solve any equation. Isolate x. First, of course balance your parentheses!
13.5=3.1sin(360/365(x-79.95))+12.18
3.1sin(360/365(x-79.95)) = 1.32
sin(360/365(x-79.95)) = 0.4258
360/365(x-79.95) = 25.20
x - 79.95 = 25.55
x = 105.50