sin (e^pi) = -0.91

Test Preparation SAT Preparation
1

<p>what?</p>

<p>question is:
If f(x) = sin x and g(x) = e^x, then f(g(pi)) =
(A)-0.91
...
(C) 0.39
...</p>

<p>answer key says it's A</p>

<p>g(pi) is e^pi, f(x) of that is sin (e^pi) = -0.91 according to the answer key, but when i plug that in i get 0.39. What am I doing wrong?</p>

<p>Does the SAT Math II have confusing questions like this?</p>

2

<p>use radian mode</p>

3

<p>ok never mind, i understand it now</p>

4

<p>how do you know when to use degree mode and when to use radian mode?</p>

5

<p>^ because when dealing with functions, say f(x) and g(x), you are dealing with real numbers. Radians are real numbers, degrees are not.</p>

6

<p>Well, the problem explicitly uses pi, which is the number used in radian.</p>

7

<p>Yeah pi is always a dead giveaway of radians.</p>

8

<p>I’ve never seen/heard of the SAT asking these kind of questions.</p>

9

<p>This is SAT II Math II I believe.</p>

10

<p>must suck to forget ur calc for math II</p>

11

<p>I have no taken calc and i am taking Math II in a week…</p>

12

<p>^u dont need calc for Math II</p>

13

<p>if you don’t need a calc for math II, the more power to you.</p>

14

<p>radian mode</p>

<p>you dont need calc for Math II, although Calc does help out if you chose. hell i used calc on my SAT I on a few questions.</p>

15

<p>I meant calculator, not calculus. Lol.</p>