we know that
A perfect cube is a whole number which is the cube of another whole number or a number is a perfect cube if the cube root of that number is a whole number.
so
<u>case a)</u> 
the cube root of 
is not a whole number
therefore
<em><u>The expression is not a perfect cube</u></em>
<u>case b)</u> 
the cube root of is not a whole number
the cube root of 
is not a whole number
therefore
<em><u>The expression is not a perfect cube</u></em>
<u>case c)</u> 
therefore
<em><u>The expression is a perfect cube</u></em>
<u>case d)</u> 
the cube root of is not a whole number
therefore
<em><u>The expression is not a perfect cube</u></em>
<u>the answer is</u>
Answer:
There are six trigonometric ratios, sine, cosine, tangent, cosecant, secant and cotangent.
Step-by-step explanation:
Answer:
Step-by-step explanation:
We know that the foci lies on the major axis, so it should lie on the x - axis. Additionally the center is the midpoint of the line joining the foci, at (0,0).
Now remember we have our foci at the point (0, ± 3). Our major axis length is 10, so if covers 5 units on either side of the x - axis. Therefore, c = 3, and a = 5. But remember that c is not part of an ellipse equation. Take a look at the formula below,
(x - h)^2 / a^2 + (y - k)^2 / b^2 = 1
However we can solve for " b " instead, using c. Take a look at another major formula below,
c^2 = a^2 - b^2,
(3)^2 = (5)^2 - b^2,
9 = 25 - b^2,
- b^2 = 16,
b = 4 = - 4
Whether b = - 4 or b = 4, or equation will be the same.
(x - 0)^2 / (5)^2 + (y - 0)^2 / (4 or - 4)^2 = 1,
x^2 / 25 + y^2 / 16 = 1
<u>Our solution is hence option number 1</u> :
Answer:
I don’t feel like it sorry
Step-by-step explanation:
hows it feel m8, not so good dont it?
15.12m2 just finished the test
