Ratio of cos is ratio that compares the side adjacent to the angle with the hypotenuse. It could be write as: cos θ = height/hypotenuse cos θ = h/x x cos θ = h Ratio of sin is ratio that compares the side in front of the angle with the hypotenuse. It could be write as: sin θ = base/hypotenuse sin θ = b/x x sin θ = b
Determine the area of rhombus Because the four triangles are congruent, we can calculate the area by multiplying one of triangle area by 4 a = 4 × area of triangles a = 4 × 1/2 × b × h a = 4 · 1/2 bh
Input b and h as the trigonometry ratio a = 4 × 1/2 × b × h a = 2 × b × h a = 2 × x sin θ × x cos θ a = 2x² cos θ sin θ