Basic Identities: tan( tan( cot( sin( ) ) = cos( ) ) = cot( ) ) = tan( ) cot( sec( csc( Pythagorean Identities cos2( ) + sin2( ) = 1 sec2( ) − tan2( ) = 1 ) ) cos( = sin( ) ) = 1 cos( ) ) = sin( ) csc2( ) − cot2( ) = 1 Double Angle Identities sin(2 ) = 2 sin( ) cos( ) cos(2 ) = 1 − 2 sin2( ) cos(2 ) = 2 cos2( ) − 1 cos(2 tan(2 Learn the formulas and graphs of sin, cos and tan, the three basic trigonometric functions, with examples and videos. Find out how to use the sine, cosine and tangent rules and the Pythagoras identity to solve problems involving right-angled triangles. Pengertian Trigonometri Kesebangunan dan Rumus Trigonometri Dasar Sudut Istimewa Sudut Berelasi pada Kuadran Sudut Negatif Sudut Lebih dari 360 Derajat Identitas Trigonometri Persamaan Trigonometri Aturan Sinus & Aturan Cosinus Contoh Soal dan Pembahasan Pengertian Trigonometri Learn the sine, cosine and tangent ratios of sides of a right triangle and how to identify the opposite, adjacent and hypotenuse sides using SOHCAHTOA. See examples, practice problems and a video lesson on the sine ratio. Trigonometric relationships are very important in the construction and planning industry and allow precise calculation of unknown lengths and angles. Part of Maths Numeracy (WJEC) Geometry and O0nh.
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    • sin cos tan rules