What is the period of the cosine function f(x) = cos x? (Hint: The period of a cosine function is 2Ο)
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What is the rule for congruence of triangles when two angles and a non-included side of one triangle are equal to the corresponding parts of another triangle?
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What is the value of sin(30Β°) when the opposite side is 5 cm and the hypotenuse is 10 cm?