OBJECTIVE: At the end of the lesson, students should be able to:
(i) identify a right-angled triangle;
(ii) identify the opposite, and adjacent of any given angle in a right-angled triangle;
(iii) apply the trigonometrical ratios: tangent, sine and cosine to solve right-angled triangles.
Chapter 11 of the New General Mathematics for SSS, Book 1.
Solve the questions below: (Exercise 11a, No. 6, 7, 9 and 10.