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Algebra 2/Trigonometry Regents Study
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Algebra 2/Trigonometry Regents Study
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25 Questions

1.
Survey - ask
Observation study - watch
Experiment - change

2.
An arithmetic sequence is created by adding or subtracting a common difference.

3.
To be a function
It must pass the vertical line test.
No x coordinate can repeat.
An equation must have a y, but the y cannot be squared.

4.

5.
The law of cosines a squared(the side across from the angle) equals b squared plus c squared minus 2 times b times c times the cosine of x (A). Use numerical solve to find the measure of angle A.

6.
Need side angle side (S.A.S) to find area.
The area of a triangle equals ½ times a times b times sine of C.

7.
To rationalize a denominator multiply the numerator (top) and denominator (bottom)
by the conjugate of the denominator (bottom).

8.

9.
In a circle the central angle in radians equals the arc length divided by radius.

10.
the quadratic formula is x equals negative b plus or minus the square root of b squared minus 4 times a times c all over 2 times a.

11.
If both terms are opposite signs they can be crossed out and replaced by a negative 1.

12.
To convert from degrees to radians multiply the degrees by pi and divide by 180.

13.
cotangent equals 1 divided by tangent or
cosine divided by sine.

14.
To convert from radians to degrees, multiply the radians by 180 and divide by pi.

15.

16.

17.
To convert from logarithmic form to exponent form the base remains the base and the rest of the stuff crosses.
the b and the n can never be negative.

18.
To solve square root equations
Isolate the square root on one side of the equation.
Square both sides of the equation
Check the answer(s) in the original equation for extraneous roots.

19.
The circle formula is x minus h squared plus y minus k squared equals the radius squared.

20.
Multiply by 180 and then divide by pi.
The part before the decimal is the degrees. Multiply the decimal by 60 to find the minutes.

21.

22.
The inverse variation formula is x one times x two equals y one times y two.
Inverse variation creates a corner hyperbola.

23.

24.
Cosecant equals 1 divided by sine.

25.

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