Ex 7.1, 19
sec 2 2 dx
sec 2 2
= 1 cos 2 1 sin 2
= 1 cos 2 sin 2 1
= sin 2 cos 2
= tan 2
= sec 2 1
= sec 2 1
= sec 2 0
= tan 0 + 1 0 + 1 +
= tan 1 1 +
= +
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