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Do Now
In the equation above, a, b, and c are constants. If the equations is true for all values of x, what is the value of b?
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Unit 3Completing the Square, Circles and the Unit Circle
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2x2 4x + 1 = 2x +8Complete the square and then solve for x
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Find the coordinates of the points on the unit circle above, by finding the side lengths of the following right triangles.
These angles are often the reference angles used for evaluating exact values without a calculator.
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17. sin(45°) = 18. cos ﴾5π/3 ﴿ 19. tan (60°)
20. sin ﴾π/6 ﴿ 21. cos (405°) 22. csc ﴾π/4 ﴿
Now the unit circle is cool and all, but why is it useful?Finding point values.
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