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# Math SAT 2 question

Registered User Posts: 169 Junior Member
edited August 2010
This is actually from the Barron's guide page 38 q. 7:
f(x)= e^x and g(x)=sinx, then the value of (f (*little circle*) g)(√2) is:

(A) -0.01
(B) -0.8
(C) 0.34
(D) 1.8
(E) 2.7

I have no idea what that lower case "e" means (Iguess we don't study that where I'm from). I found it on the calculator but how do you actually compute a question like this?
Post edited by karenoona on

## Replies to: Math SAT 2 question

• Registered User Posts: 113 Junior Member
This problem is a composite function question. It translates to f(g(sqrt2)). Plug in square root of 2 into sinx and the use the answer you get from that to plug into e^x. This should give you (E), 2.7.

**Note, put your calculator into radian mode since the sqroot of 2 doesn't have a degree symbol**
• Registered User Posts: 169 Junior Member
Oh!! Thank you so so much...Putting radian mode was what I missed, I'm totally out of shape in this material. Thanks again!
This discussion has been closed.