For what values of x is arcsin(sin x) = x? This is for a calculus class. I'm kind of confused.
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Originally Posted by Mush89 For what values of x is arcsin(sin x) = x? This is for a calculus class. I'm kind of confused. I suggest that you plot both these functions: . Where do the graphs agree. And why?
Hello, Mush89! Interesting question! Since always returns the principal value, . . I would say: . For other angles, say, , . . we have: . . . then: . That is: .
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