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Mathematics 8 Online
OpenStudy (anonymous):

Solve 0=1-sin(2πT)

OpenStudy (anonymous):

-1=-sin(2piT) 1=sin(2piT)

OpenStudy (anonymous):

since we know 2pi is just a full revolution you can find T and it willhave the same value as 2piT sin(t)=1 pi/2 is the only time sin = 1

OpenStudy (anonymous):

Add 2piT both the sides, \[\sin(2 \pi T) = 1\] Now, for \[sinx = sina\] The general solution is given by: \[x = [n \pi + (-1)^n.a] , n \in Z\]

OpenStudy (anonymous):

to get all values of sin=1 simply add 2pi n \[\pi /2+2\pi n\]

OpenStudy (anonymous):

really need to refresh my mind on trig identities

OpenStudy (anonymous):

\[\sin(2 \pi T ) = 1\] \[\sin(2 \pi T) = \sin \frac{\pi}{2}\] \[2 \pi T = n \pi + (-1)^n \times \frac{\pi}{2}\] \[T = \frac{n}{2} + (-1)^n \times \frac{1}{4} = \frac{n}{2} + \frac{1}{4}(-1)^n\] So the general solution will be:

OpenStudy (anonymous):

\[T = \frac{n}{2} + \frac{1}{4}(-1)^n\]

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