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These question is my homework and I have no idea to find out these differentiate.

These question is my homework and I have no idea to find out these differentiate.

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f ( ) cos sin f ' sin 2 cos 2 cos sin y 7 x 2 sin x cos x
y ' 7 x 2 sin 2 x 7 x 2 cos 2 x 14 x sin x cos x
y sec tan y ' sec tan 3 sec tan 2 sec tan 2 tan 1

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