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What is the value of \( \sin 30 ^ \circ \)?

What is the value of \( \cos 45 ^ \circ \)?

What is the value of \( \tan 60 ^ \circ \)?

What is the value of \( \sin^2 0 ^ \circ + \cos ^2 90 ^ \circ \)?

What is the value of \( \sin (-360^\circ) \) ?

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