The sine rule and cosine rule . The sine rule is used when we are given either a) two angles and one side, or b) two sides and a non-included angle. The cosine rule is used when we are given either a) three sides or b) two sides and the included
Mensuration-2
Non-right angle triangle . triangle that is not a right triangle is an oblique triangle. Solving an oblique triangle means finding the measurements of all three angles and all three sides. Non right angle triangle
Sine and Cosine Rule. Non right angle triangle can be done with the Law of Sine and Law of Cosine. Hence we apply this concept for non right-angle triangle. Also we apply for angle when three sides given. Sine and Cosine Rules.
Law of Cosines (also called the Cosine Rule) says: c2 = a2 + b2 − 2ab cos(C ). Law of Sines (or Sine Rule) is very useful for solving triangles: a sin A = b sin B = c … sine of angle B, and also equal to side c divided by the sine of […]
