G11
Trig Identities & Law of Cosines
Practise radians/degrees conversion, the law of cosines, and the Pythagorean identity — with clean, printable worksheets and a full answer key.
Convert π/2 rad to degrees
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90°
a=5, b=6, C=60° — find c²
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31
sin A = 5/13, A acute — cos A
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12/13
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