does dy/dt of 2.5sin((pi)t/12) = 2.5cos((pi)t/12)?
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Originally Posted by PIR does dy/dt of 2.5sin((pi)t/12) = 2.5cos((pi)t/12)? No The derivative of is The derivative of f(ax+b) is : a f'(ax+b)
Originally Posted by PIR does dy/dt of 2.5sin((pi)t/12) = 2.5cos((pi)t/12)? No it doesn't. You need to apply the chain rule on that Remember that by the chain rule if then
Thank you you two. Maths in the morning doesn't work for me I really should have picked up the chain...
Originally Posted by PIR does dy/dt of 2.5sin((pi)t/12) = 2.5cos((pi)t/12)? Use the chain rule. Where K and R are constants.
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