<p>Question</p>
<p>pg 36 Q 7
If f(x) = e^x and g(x) = sin x, then the value of f(g(x)) (root 2) is </p>
<p>a)-0.01
b)-0.8
c)0.34
d)1.8
e)2.7</p>
<p>The book says the answer is E. 2.7 but when I use my TI-83 plus it says 1.024987</p>
<p>I’m guessing your calculator is in degree mode whereas this question is asking about radians.</p>
<p>Oh right, guess i’m stupid.</p>
<p>No worries. Happens to the best of us. When you get questions and you’re curious whether to use radians or degrees, look at the answers, radians will usually have -3 to 3 or so, maybe higher depending on the question, but degrees will almost always look like -90 to 90, or in this case much much larger since e is being taken to the power of the angle. Hope this helps and good luck.</p>
<p>Usually arguments of trigonometric functions are in radians, unless you see a degree symbol.</p>
<p>yeah my calculator got 2.7 on radian mode</p>
<p>I like how choices A and B are negative, even though e raised to a real number is never negative. However, sin(e^(sqrt(2)) gives answer choice B.</p>