6.2 Trigonometric Functions: Unit Circle Approach/101

$f(\theta )=\sin(\theta )$

$f(2\theta )$

$f(2(60^{\circ })=120^{\circ }$

Failed to parse (syntax error): {\displaystyle f(2\theta)= f(2\cdot\60) }

sin(120^\circ)= \frac{\sqrt{3}}{2}