Seems that others have similar problems that I do. I've finished up most of my review packet, just a few things I don't quite get yet. Wondering if someone here could clarify these two questions. Then all I have left is to face the daunting task of saving myself from my own stupidity.
1. Find the exact value of the expression. Do not use a calculator.
csc^2 70 degrees - tan^2 20 degrees
a) 2 b) 0 c) -1 d) 1
I think the others I am figuring out right now.
ok, here's the trick. it might take a while for us to go through this with me giving you hints, so i'll just give you a possible solution.
things to know:
(4) the sine of an angle is equal to the cosine of its compliment (complimentary angles are angles that sum to 90 degrees).
so, for instance: , , , etc
particularly what we will use here is:
there are other solutions here. this is just the one that occurred to me first. maybe sixstringartist can come up with another one