Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 34)
In a right-angled triangle, which components are needed to find the remaining angle?
The measure of one angle
Knowledge of the side lengths
The use of the tangent
The knowledge of the ratios
הֶסבֵּר
With one angle and side lengths, the remaining can be found.