周期性　n は整数
\(\sin(\theta+2n\pi)\)
\(\cos(\theta+2n\pi)\)
\(\tan(\theta+n\pi)\)

補角の公式　対称性
\(\sin(\pi-\theta)\)
\(\cos(\pi-\theta)\)
\(\tan(\pi-\theta)\)

余角の公式　対称性
\(\sin\left(\dfrac{\pi}{2}-\theta\right)\)
\(\cos\left(\dfrac{\pi}{2}-\theta\right)\)
\(\tan\left(\dfrac{\pi}{2}-\theta\right)\)