Find the exact value. cos150°
2 answers:
ANSWER
EXPLANATION
We want to find the exact value of cos(150°).
150° makes an angle of 30° with the positive direction of the x-axis and it is also in the second quadrant.
The cosine ratio is negative in the second quadrant.
Using the unit circle,
Answer:
-√3/2
Step-by-step explanation:
Cos 150° can also be rewritten as shown;
Cos 150° = cos(90°+60°)
According to trigonometry identity
Cos(A+B) = cosAcosB - sinAsinB
Therefore;
Cos(90°+60°) = cos90cos60-sin90sin60
Cos(90°+60°) = 0(1/2) - 1(√3/2)
Cos(90°+60°) = 0-√3/2
Cos(90°+60°) = -√3/2
Cos 150° = -√3/2
You might be interested in
Answer:
C 47.12 L
Step-by-step explanation:
1 gallon = 3.8 liters
12.4 gallons = x
Cross Multiply
= 12.4 × 3.8
47.12 liters
Option C is correct
If lane's are span is 61 inches. his height is 1/4 foot long than his arm span. his height is <span>5 ft 3 inches </span>
Answer:
(0,5) and (1,0)
Step-by-step explanation:
699,00 = 100%
6.99 = 1%
41.94 = 6%
699,00 - 41,94 = 657.06
Answer:
5 feet
Step-by-step explanation: