The trigonometric ratios sine, cosine and tangent are used ... to extend trigonometry beyond right angled triangles and use it to solve problems involving any triangle.

Calculate the angle QPR. Give the answer to one decimal place. Label the sides of the triangle \(o\), \(a\) and \(h\). Next choose the correct ratio from \(s^o_h~c^a_h~t^o_a\). In the triangle the ...