Answers

2014-01-24T20:21:39+05:30
The periods of sin(x) and cos(x) are both 360o so sin(x) + cos(x) repeats on any interval of length 360o. Thus 360o is a period of sin(x) + cos(x).
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2014-01-25T11:52:48+05:30
Principle period of sinx is 2pi 
so period of sinx is 2pi+x
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