Explain why the graph of can be obtained from the graph of by a horizontal shift of…

MATHEMATICS · Subjective · AP · AP Precalculus · Trigonometric and Polar Functions · Trigonometric and Polar Functions

Problem

Explain why the graph of

y = \cos x

can be obtained from the graph of

y = \sin x

by a horizontal shift of

\dfrac{\pi}{2}

units to the left.