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Choose the correct option and justify your choice:
Sin 2A = 2 sin A is true when A =
Out of the given alternatives, only A = 0° is correct
sin 2A = sin 0° = 0
2 sin A = 2sin 0° = 2(0) = 0
Hence, (A) is correct
Evaluate the following:
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°