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Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 3 - No. 33)

In the formula a^2 = b^2 + c^2 - 2bc*cosA, which side is opposite to angle A?
Side b
Side c
Side a
Side a and b

説明

The side 'a' is always opposite angle A.

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