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cossine

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aj221 said:
Hi I somehow just don't get these two questions, it would be great if someone could upload solutions for them. Thanks in advance :)
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8. Create the differential equation. And then solve the differential equation.
9. If you know the trig identities such as 1 + tan^2(theta) = sec^2(theta). You just need to give it go and see how things turn out.
 
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