integration

2013-03-10 6:45 am

http://upload.lsforum.net/users/public/d7969Untitleds184.jpg

why this question dont have to consider both x>2 and x <-2 ??
just consider x>2 ???

回答 (1)

2013-03-13 5:48 am

✔ 最佳答案

The solution set x = 2secθ

As secθ = 1/cosθ and -1 <= cosθ <= 1

The range of x is x > 2 or x < -2

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