Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 5 - No. 10)
If you know the height of a building and the angle of elevation to its top, which trigonometric function should you use to find the distance from you to the building?
Sine
Cosine
Tangent
Cosecant
Explicação
Tangent(angle) = height/distance. Therefore, if you know the angle and height, you use the tangent to find the distance.