Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 13)
When finding an angle using trigonometric ratios, which other component(s) is/are necessary?
A scientific calculator.
Knowledge of the trigonometric formulas.
Knowing the ratios.
The use of the inverse functions.
Explanation
To find the angle you need to know the ratios, use inverse functions and the right calculator.
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