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(29A) The Unit Circle
Find the exact value of:
$\cos 180°$
$\cos 90°$
$\cos 300°$
$\sin 210°$
$\cos 270°$
$\cos 150°$
$\cos 30°$
$\cos 315°$
$\cos 120°$
$\sin 270°$
$\tan 45°$
$\sin 315°$
$\cos 60°$
$\cos 45°$
$\sin 180°$
$\sin 120°$
$\cos 240°$
$\sin 240°$
$\sin 30°$
$\cos 0°$