Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 1 - No. 10)
If A boat, C, is 20m north of point K, and the angle of elevation to the top of the tree T from C is 15 degrees, how is the height of the tree, KT, calculated?
Tan
Cosine
Sine
Pythagorean Theorem
Giải thích
Using tan(angle) = opposite/adjacent, or tan(15) = KT/20m, is used to find the height, KT.