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(29A) The Unit Circle
Find the exact value of:
$\sin 225°$
$\cos 300°$
$\sin 90°$
$\cos 120°$
$\cos 30°$
$\cos 330°$
$\cos 180°$
$\sin 330°$
$\sin 120°$
$\tan 30°$
$\sin 210°$
$\cos 225°$
$\cos 210°$
$\sin 0°$
$\cos 60°$
$\cos 45°$
$\tan 45°$
$\cos 135°$
$\cos 315°$
$\sin 180°$