**Vaheh**: GraphSketch doesn’t seem to understand brackets in the way you’d expect, so you’ll have to use parentheses instead, like (sin(x)*cos(x))^2. Thanks for pointing that out, I may have to see about getting it to interpret brackets too.

**ProfRay**: Thanks! Always good to hear people using GraphSketch.

**Tom Veatch**: Yep, there was a temporary issue with GraphSketch. Thanks for pointing it out, though! It should be fixed now (and for a while, as I’ve been slow at writing up responses to blog comments).

**Muhammad Farooq Ali**: Thanks! Unfortunately, right now it’s not possible to label the grid lines in terms of pi. I had looked into it, and unfortunately, it’s not particularly easy given how the graph labels are plotted. I’ll note it down for potential future improvements, though.

**SARWARISH**: y=abs(sin(x))

I use it often when answering questions from Yahoo!Answer. I feel that if a student can see the graph of a function then they might be able to see the characteristics of that function, which is often the goal of the exercise.

My Y!A handle is ProfRay.

]]>I tried to graph the following function:

[sin(x)*cos(x)]^2

but the answer does not look correct! It has negative sides which is impossible, since the graph should always be positive.

Thanks again,

Vaheh

**Riley Swart**: Use the abs(x) function.

**Bob Casagrande** and **Wilson**: There’s no way to do so without using the properties of logarithms, but you can of course use those: Log_5(x)=ln(x)/ln(5) (or log(x)/log(5), if you prefer).