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# C4 Parametric Equations help. watch

1. OK so y=30sin2t and x=16t2-pi2

I need to integrate and find the area between pi/4 and pi/2 but i dont know how to get to the first stage, which is:

∫ 30sin2t.32t dt
2. (Original post by sb1986)
OK so y=30sin2t and x=16t2-pi2

I need to integrate and find the area between pi/4 and pi/2 but i dont know how to get to the first stage, which is:

∫ 30sin2t.32t dt
Area = ∫y dx = ∫ y (dx/dt) dt

between the given limits

To do the integral use integration by parts
3. (Original post by RichE)
Area = ∫y dx = ∫ y (dx/dt) dt

between the given limits

To do the integral use integration by parts
Cool thanks

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