Which of the following expressions is equal to -1?
sec90°
sin180°
csc270°

Ineed with number 6 , explain how to get 1978

Ialready asked this but i never got an answer. will give a high rating and perhaps brainliest. choose the linear inequality that describes the graph. the gray area represents the shaded region. y ≤ –4x – 2 y > –4x – 2 y ≥ –4x – 2 y < 4x – 2

Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee