There are three main trigonometric functions - Sine θ (sin θ), Cosine θ (cos θ) and Tangent θ (tan θ). Sin θ - Ratio of Perpendicular to Hypotenuse Cos θ - Ratio of Base to Hypotenuse Tan ...

Protocol; Spring Waltz; Rain Hike; Blues For Yokohama; So Easy To Remember; Rin Ki Ou Hen; Lament For The Ocean; The Great Triplet; Morning Stretch; Cosine Meets Tangent.

Which gives us solutions of \(90^\circ ,224.4^\circ ,270^\circ ,315.6^\circ\) There are two more methods for you to learn, both of which involve \(\cos 2x\). For any trigonometric equation ...