# A generator at a regional Power Station produces an alternating voltage, according to the function, 𝑉 below:

? = 240sin(2?)

An electrical engineer needs to determine when this generator will have a voltage that is exactly +120 V.

i) How many times in the interval 0 ? ? ? 2? will the voltage reach +120 V?

ii) Determine the exact times when this occurs for 0 ? ? ? 2?.

I would like the answer to ii) with workings so I can see how it is done, I do not need i) answered.
Thanks

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