I am in 11th grade Algebra II with Trig Honors.
Here is my question:
Sec 140 is equivalent to all of the following except...
a) -sec 40
b) sec (-140)
c) csc 50
d) -csc 50
I said the answer was (b).
That was wrong.
I figured out that the right answer was (c), but I had to use the calculator (does anyone feel that we're too dependent on those things?) to figure it out and we weren't allowed to use one on the test...
Also, in my textbook (regents textbook for an honors class... very helpful... not) the questions like this only dealt with numbers like 30, 45, 60, 90, etc. Part of what confused me was that the numbers were 50, 40, and 140. How do you figure out what -sec 40 equals, for example, without the calc?
Please help (and quickly if possible)