If x = -3, calculate the value of: 2xsquared + x
2 answers:
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Answer:
Step-by-step explanation:
The radius is the distance between the center and any point on the circle.
The formula of a distance between two points:
We have the center (3, -3) and other point on the circle (7, 6).
Substitute:
Answer:
option D is true.
Step-by-step explanation:
The right-angled triangle is shown.
From the right-angled triangle,
The angle Ф = 60°
We know that the trigonometric ratio
tan Ф = opposite / adjacent
- opposite = 4
- adjacent = n
Thus,
tan 60 = 4 / n
√3 = 4/n
n = 4/√3
Thus,
n = 4/√3
= (4 × √3) / (√3 × √3)
= 4√3 / 3
Thus,
n = 4√3 / 3
Using Pythagorean theorem
m = √n²+4²
Thus,
- n = 4√3 / 3
Therefore, option D is true.