We first looked at getting a bearing measurement between three cities. The law of cosine was used. As more information is found, you can use the Law of Sine and properties of triangles. Another …
Why to use the Law of Sines and the Law of Cosines
We looked at problems involving the Law of Sines and the Law of Cosines. You can use these equations with any triangle, they do not have to be right triangles. Depending on the information you have, …
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sin^2x = (sinx)^2 Squared Trig Function Notation
We went into verifying some equations with trigonometric. They involved angles in both degrees and radians. Sometimes with equations that had notation of something like sin^2x, which means (sinx)^2 …
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Solving Inequalities and finding intervals, Tutoring Precalculus
We started by looking at the Friday Sheet. With inequalities, the steps are basically 1. Use factoring/etc to find boundary points 2. Plot the boundary points with open or closed circles on a number …
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Getting Arc Length, Tutoring Precalculus
We started with a word problem trying to find arc length based on latitude and longitude. Reviewed the equations for the circumference of a circle and the area of a circle. You can get arc length by …
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Variations in plotting trig functions, tutoring Precalculus
We looked at graphing different trigonometric functions with variations. Started with sin x and cos x. Looked at expansions/contractions, shifts vertically and horizontally. Used the chocolate trick …
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