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Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 3 - No. 44)

If cos(θ) = 0.8, what is θ (approximately)?
36.9°
53.1°
45°
60°

Εξήγηση

Using the arccos function, arccos(0.8) = 36.9 degrees

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