The exact value of cos120 if the measure 120 degrees intersects the unit circle at point (-1/2,√3/2) is 0.5
<h3>Solving trigonometry identity</h3>
If an angle of measure 120 degrees intersects the unit circle at point (-1/2,√3/2), the measure of cos(120) can be expressed as;
Cos120 = cos(90 + 30)
Using the cosine rule of addition
cos(90 + 30) = cos90cos30 - sin90sin30
cos(90 + 30) = 0(√3/2) - 1(0.5)
cos(90 + 30) = 0 - 0.5
cos(90 + 30) = 0.5
Hence the exact value of cos120 if the measure 120 degrees intersects the unit circle at point (-1/2,√3/2) is 0.5
Learn more on unit circle here: brainly.com/question/23989157
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Answer:
He began with 12.
Step-by-step explanation:
14-8=6
You need to multiply 6 because he sold half of his comic books at the beginning.
6*2=12
Answer:
A
Step-by-step explanation:
Argument
C and D are wrong right off the top. When you have x + 2 in synthetic division the divisor (2) must change signs.
B is incorrect because you don't change the signs of the polynomial that is being divided into. So that only leaves A and it is correct.
Summary
- Change the sign of the binomial doing the dividing (2 goes to - 2)
- Leave the polynomial's coefficients alone.
Answer: x=9,3
Step-by-step explanation:
The answer would be -4.5/5. You would have to plot the number in between -2 and - 1 4/5. Hope this helps!