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# FP2 Integration watch

1. I have a question from FP2, the topic about inverse trigonometric functions.

With limits 1.5 and -1.5.

I got this to integrate to with limits 1.5 and -1.5, and with these coming out as 1.5 and -1.5 respectively, I get an answer of . However my intergrating calculator gets an answer of 1.11....... I feel i'm right as it asks for an exact value for each of the integrals but why would the calculator give me something different?

2. (Original post by scillage)
I have a question from FP2, the topic about inverse trigonometric functions.

With limits 1.5 and -1.5.

I got this to integrate to with limits 1.5 and -1.5, and with these coming out as 1.5 and -1.5 respectively, I get an answer of . However my intergrating calculator gets an answer of 1.11....... I feel i'm right as it asks for an exact value for each of the integrals but why would the calculator give me something different?

You forgot to divide by root 2
3. (Original post by Indeterminate)
You forgot to divide by root 2
Why do I have to divide by ? Is it because you have to have the coefficient as 1?
4. (Original post by scillage)
Why do I have to divide by ? Is it because you have to have the coefficient as 1?
In the expression you're integrating, yes.

You can verify this by differentiating the RHS
5. (Original post by Indeterminate)
In the expression you're integrating, yes.

You can verify this by differentiating the RHS
Ok, thanks very much for your help

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