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# Tutor profile: Laurel B.

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Laurel B.
High School Math Teacher
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## Questions

### Subject:Trigonometry

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Question:

Given that sinA = 8/17, find angle A.

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Laurel B.

To find angle measures using trigonometric ratios, take the inverse of the trig function. Given that sinA=8/17, the inverse sine of A = sin^-1(8/17) = 28, therefore Angle A = 28 degrees.

### Subject:Geometry

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Question:

Given the base angle of an isosceles triangle is 56 degrees, find the measures of the other two angles.

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Laurel B.

Because the triangle is isosceles, the base angels are congruent. Therefore, one other angle is 56 degrees. The three angles of a triangle add up to 180 degrees. 180-56-56 = 68 degrees. Angle 1 = 56 degrees Angle 2 = 56 degrees Angle 3 = 68 degrees

### Subject:Algebra

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Question:

Find the slope of a line using points A (3,5) and B (2, 1).

Inactive
Laurel B.

The slope of a line is how steep the line is, or how much it rises (vertical) over its run (horizontal). Slope is calculated as "rise" over "run", or the change in the y direction divided the change in the x direction. To calculate the slope between two points, first label the coordinates of each point as (x1, y1) and (x2,y2). Using the slope formula of (y2-y1)/(x2-x1), plug in your points and calculate the slope. A (3,5) 3 = x1, 5 = y1. B (2,1) 2 = x2, 1 = y2. (1-5)/(2-3) = -4/-1 = 4. The slope of the line is 4.

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