Study of triangles and trigonometric functions including sine, cosine, and tangent.
Read the problem carefully. Identify what you know (sides, angles) and what you need to find. Choose the right ratio or formula, set up the equation, and solve step by step. Double-check your answer by plugging it back into the original triangle.
Listing known and unknown values in a triangle before choosing a trigonometric ratio.
Checking your answer by making sure the calculated side lengths fit the triangle’s conditions.