Saying arccos(-√2/2) is the same as saying cos(x)=-√2/2. This is one the trigonometric values you should have memorized if you are taking a a trig class. In order to get √2/2, x must be equal to 45° or pi/4. But since it is a negative √2/2, the answer would be -45°or -pi/4.
There are technically multiple answers to this, but since you weren't given a range for the answers, I would stick with -45°.
Hope this helps
Answer:
See below.
Step-by-step explanation:
6x-2≤9
+2 +2
6x≤11
/6 /6
x≤11/6
4+3x>15
-4 -4
3x>11
/3 /3
x>11/3
-hope it helps
Answer:
c^2 = 6^2 -8
Step-by-step explanation:
The square of c is c^2; the square of 6 is 6^2. for the former to be 8 less than the latter, we must have ...
c^2 = 6^2 -8
The answer to your question is just use Desmos
