Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 1 - No. 6)
What is/are the correct ways to determine angles when using trigonometry?
Using inverse trigonometric functions (sin⁻¹, cos⁻¹, tan⁻¹)
By substituting the ratios of the sides
By using the formula for area
By converting the angles into degrees, radians and grades.
Paliwanag
The ways to find angles of a triangle involve ratios and converting the value to a different value to determine the correct answer.