given the instructions to find the following if i am given that sinx=3/5 while cosx<0 and tanr=-8/15 while sinr>0 (x and r being general variables...)
b. sec (r)
c. sin (x-pi)
d. tan (-r)
I have absolutley no idea how to go about this problem and it would be very helpful is someone could help me with just one of the problems so i understand the process... what exactly is it asking?
How would i continue that process for problems such as sin(x-pi)? I don't remember ever using triangles for these problems... only algebra... so i'm a bit confused