Answer: -1
Step-by-step explanation:
First change tan(315) to:

Then evaluate the sine and cosine function. What is the y component of 315 degrees? What is the x component of 315 degrees?

Step-by-step explanation:

Answer:
Do you have a picture
Step-by-step explanation:
Answer:
z=-3
Step-by-step explanation:
42 = -7z+21
-7z=21
z=-3