Question

Determine the value of \cos \dfrac{17\pi}{4}

Collected in the board: Trigonometry

Steven Zheng posted 5 months ago

Answer

\cos \dfrac{17\pi}{4}

=\cos (4\pi+\dfrac{\pi}{4} )

=\cos \dfrac{\pi}{4}

=\dfrac{\sqrt{2} }{2}

Steven Zheng posted 5 months ago

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