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Evaluate the following:
(i) sin60° cos30° + sin30° cos 60°
= ( ( + ( (
(ii) 2tan245° + cos230° - sin260°
= 2 (1)2 + (2 - (2
= 2 + –
Choose the correct option and justify your choice:
Sin 2A = 2 sin A is true when A =
If and find A and B
State whether the following are true or false. Justify your answer
(i) Sin (A + B) = sin A + sin B
(ii) The value of sin θ increases as θ increases
(iii) The value of cos θ increases as θ increases.
(iv) Sin θ = cos θ for all values of θ.
(v) Cot A is not defined for A = 0°