Answer:
I and III
Step-by-step explanation:
On a unit circle, the only two angles whose sine is 
are 
and 
, otherwise known as 
. Therefore, the correct answers are I and III. You can see the unit circle below, where the y coordinates of the above angles show .
Answer:
I believe it is A because the last number shouldn't have a variable.
True
3/6 = 0,5
1/8 = 0,125
0,5 > 0,125
Answer:
c. x>4
Step-by-step explanation:
subtract 7 from both sides. 11-7=4
x>4
Given: m∠A + m∠B = 90° (Definition of Complementary Angles).
Given: m∠B = (5x + 8)°
A) m∠A = 180° + (5x + 8) is your answer choice:
Why it isn't the others:
B) m∠A = 90° - (5x + 8)
You are solving for complementary angles (90° in total when combined), so you subtract the measurement for B (5x + 8) to get A.
C) m∠A = 180° - 2(5x + 8)°
You double the complementary angle to solve for the supplementary. Essentially, just divide this answer by two to get the complementary angles.
D) m∠A = 82 - 5x
I was confused by this one, but essentially they just did one step of the isolating the variable, which was subtracting 8 from both sides. They did not finish isolating the variable however.
