Question 1152510
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The statement of the problem uses invalid notation; as a result, there is no way to find the answer.<br>
Fortunately it is quite clear what the real meaning of the problem is.<br>
If {{{cross(f(0) = sin0 and k(0) = tan0)}}} f(x) = sin(x) and k(x) = tan(x), find f(480)+k(390).<br>
f(480) = f(480-360) = f(120) = sin(120)<br>
k(390) = k(390-360) = k(30) = tan(30)<br>
Use your unit circle to find the answers.<br>