Hi,

the directions are: find the exact value of the expression. Use a graphing utility to verify your results.

I've done the problem but I'm not sure if I've done it right... and I'm also unsure about the negative in the original equation:

the problem is::

sec[arctan(-3/5)]

this is what I've done so far-

I drew the triangle using tan=opposite/adjacent

then I used pythagorean theorem to find the hypotenuse. it was the square root of (34).

after this I found the sec. which was the square root of (34)/5

my question is if what I've is correct and where does the negative sign go in finding the solution?

Am I supposed to just add it into the final answer???

thank you!!

p.s - I don't know how to make the square roots appear on the screen... that's why I wrote it out... everything in parentheses is under the square root.