Step-by-step explanation:
x²-xy-xy+y²
x²+2xy+y²
hope it helps
Answer:
8x-16y
Step-by-step explanation:
Answer:

Step-by-step explanation:
Notice from the attached image that -315 degrees is the same as 45 degrees.
Recall as well that the csc function is defined as the reciprocal of the sine function: 
Then, you need to evaluate 
The answer to your problem is 6