If A, B, C, are the interior angles of a triangle ABC, prove that

(i)

(ii)

4

Express in terms of angles between 0° and 30°.

5

If sin 3A = cos (A – 26°), where 3A is an acute angle, find the value of A.

7

Prove that:

(i)

(ii)

(iii)

(iv)

8

Prove the following:

(i)

(ii)

(iii)

(iv)

(v)