Recent content by Taryn1

Ohhhh, I think I get it now. Thanks!

This problem probably should be easy, but I don't remember learning the basic way to do these problems: Write the trigonometric expression as an algebraic expression: cos(arccos x + arcsin x) The answer is zero, but I don't know how to get there...

Thanks for your help! That makes more sense now.

So I'm supposed to find the exact values of the sine, cosine, and tangent of an angle by using a sum or difference formula ( i.e. sin(x+y)=sin(x)cos(y)+cos(x)sin(y) ), but this is the angle I was given: ${-13\pi}/{12}$. How do I use a sum or difference formula to get the sin, cos, and tan of that?

Have you tried drawing the problem out and visualizing the roads? It can really help, for a start.

Oooohhhhh, right. Polynomial long division. I knew it was something I should have remembered from algebra! Thanks :)

(Wondering) How do you get that from the equation? By guessing and plugging in -2 and seeing if it equals zero? ...because I have the answers in the back of the book, but I don't know how to technically get them!

So I'm supposed to find all the real zeros of this polynomial function: $\int$ $\left(x\right)$ = $x^3$ + 3$x^2$ - 4$x$ - 12 Usually, to find the zeros, I would use the quadratic function $\frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$ But what do I do with the 3 at the beginning of the function? I...

Thanks! That makes sense now. That's exactly the answers the book had. :)

I feel like this should be a super easy problem, but I'm not understanding something about it. The graph of y = f(x) passes through the points (0, 1), (1, 2), and (2, 3). Find the corresponding points on he graph y = f(x + 2) - 1. I graphed the (x + 2) - 1, but what does it mean by...

lol I read this thread title too fast and for a minute I thought it said 'proof of superman'!

Cool. Thanks so much for the help!

Cool, thanks. It makes a little more sense now. (Whew)

Hi again I'm trying to graph a function in WolframlAlpha, but I can't figure out how to set limits on the x-value's domain. Is that an option for that site? I'm trying to do this function set: _____ 4-x^2, x < -2 h(x) = 3 + x, -2 \le x < 0 _____x^2 + 1, x \ge 0 It's hard enough to...

Thanks Devono! And yeah, I use polynomials. Just not on that level!