<u>Answer:</u>
<u>Answer:a. Since 20° is in the first quadrant, the reference angle is 20° .</u>
<u>Answer:a. Since 20° is in the first quadrant, the reference angle is 20° .b. Reference Angle: the acute angle between the terminal arm/terminal side and the x-axis. The reference angle is always positive. In other words, the reference angle is an angle being sandwiched by the terminal side and the x-axis. It must be less than 90 degree, and always positive.</u>
<u>Answer:a. Since 20° is in the first quadrant, the reference angle is 20° .b. Reference Angle: the acute angle between the terminal arm/terminal side and the x-axis. The reference angle is always positive. In other words, the reference angle is an angle being sandwiched by the terminal side and the x-axis. It must be less than 90 degree, and always positive.c. The rays corresponding to supplementary angles intersect the unit circles in points having the same y-coordinate, so the two angles have the same sine (and opposite cosines).</u>
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0.4x = 32
Solve for x
x = 32/0.4
x = 80
We know that 17 over 25 is a fraction. To convert to decimal we have to do - <span>Numerator / Denominator.
</span>
Numerator: We call the top number the Numerator, it is the number at the top of the fraction you have.
Denominator: We call the bottom number the Denominator, it is the whole number that is at the bottom, it is the number that is divided into.
<span>
To solve this problem we have to set up long division.
17 / 25 = 0.68
0.68 is a terminating decimal. </span>
Hello,
Find the equation of the axis of symmetry is like find the maximum or minimum point of this function.
![f(x)=2x^2+4x-3\\\\\alpha=-\dfrac{b}{2a}=-\dfrac{4}{4}=-1\\\\](https://tex.z-dn.net/?f=f%28x%29%3D2x%5E2%2B4x-3%5C%5C%5C%5C%5Calpha%3D-%5Cdfrac%7Bb%7D%7B2a%7D%3D-%5Cdfrac%7B4%7D%7B4%7D%3D-1%5C%5C%5C%5C)
The equation of the axis of symmetry is then :
![x=-1](https://tex.z-dn.net/?f=x%3D-1)
![\beta=f(\alpha)=2(-1)^2+4(-1)-3=2-4-3=-5](https://tex.z-dn.net/?f=%5Cbeta%3Df%28%5Calpha%29%3D2%28-1%29%5E2%2B4%28-1%29-3%3D2-4-3%3D-5)
Coordinates of vertex :
38 pudupdlhduodupslhdgoshoxgodlhdhldohdoyd