TRIGONOMETRY

Ø The branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions of any angles.

Ø Trigonometric angles

Ø Sine(sin)

Ø Cosine(cos)

Ø Tangent(tan)

Ø Trigonometric ratios

Ø Sin

Ø Cos

Ø Tan

Ø Cosec

Ø Sec

Ø Cot

PROBLEMS

1. If tan A = , then find all the other trigonometric ratios.

2. Evaluate: (i) sin 30 + cos 30 (ii) tan 60 cot60 (iii) (iv)

3. Find the value of cos 1959’.

4. Find the area of the right angled triangle with hypotenuse 5cm and one of the acute angle is 4830’.