Geometry

# Trigonometric Periodicity Identities

Which of the following is equal to $3\cos(11\pi+x)?$

Which of the following is equal to $2\tan\left(x-\frac{5}{2}\pi\right)?$

Which of the following is equal to $\sin^2(5\pi+x)+\cos^2(-4\pi-x)+\tan^2\left(\frac{5}{2}\pi+x\right)$ for a random $x?$

Find the value of $\sin\left(-\frac{5}{3}\pi\right)+\cos\left(\frac{59}{6}\pi\right)+\tan\left(\frac{31}{3}\pi\right).$

Which of the following is equal to $\sin\left(\frac{39}{2}\pi+3x\right)?$

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