Question

csc(2cos^-1(-3/4))

Answer 1

I like drawing right triangles for these.
csc(2*angle)
Let angle (we will call it A)
Let A=arccos(-3/4)
So cos(A)=-3/4
Draw a right triangle in the second quadrant. I say the second quadrant because cos is negative and arccos only gives outputs between 0 and 180 degrees.

Answer 2

Still have no idea

Answer 3

so you have no idea to draw a right triangle in the second quadrant and use the definition of cos to help you label the proper sides with their measurements?

Answer 4

if you want to i can check to see if you can draw a right triangle in the second quadrant.
just use the draw tool.

Answer 5

csc * cos^-1 i think gives cos * sin since csc is reciprocal of sine and you are multiplying a reciprocal by an inverse.