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The corresponding reference circle for a...

The corresponding reference circle for a given SHM has been shown in the figure. Given `pi = ( 7pi)/(4)` . Write the corresponding equation of SHM. Consider anticlockwise direction for rotation.

Hint `: x= 2 cos ( 2pit+ (7pi)/( 4))`
`2 cos ((3pi)/( 2) + ( 2pit+(pi)/(4)))`

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`x= 2 cos ( 2pit + ( 7pi)/(4))`
`=2 cos (( 3pi)/(2)+ ( 2pit + (pi)/(4)))`
`= 2 sin ( 2pit + ( pi)/(4))`
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