Asked by BM
The hours of daylight in LA oscillates from a low of 10 hours in Jan to 14 hours in July. How many months of the year are there more than 13 hours of daylight?
Answers
Answered by
oobleck
setting January is when t=0,
just solve
12 - 2cos(π/3 x) > 13
just solve
12 - 2cos(π/3 x) > 13
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