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A helpful scientific calculator that runs in your web browser window.
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Holt Online Learning
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Using the law of sines and law of cosines to solve non-right triangles.
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Dave's Short Trig Course
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How to solve trigonometric equations.
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SOS Math
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A great site for math worksheets. Includes the best unit circle on the web. You can even request new ones for free!
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Embeddedmath
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The perfect study site for high school, college students and adult learners. Get help to do your homework, refresh your memory, prepare for a test, ....
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SOS math
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Step-by-step solutions to odd-numbered problems from dozens of precalculus textbooks.
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Hotmath
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Gives a detailed explanation on working with Trigonometry and different triangles. Also goes through some proofs in regards to showing triangles are congruent to each other.
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The Math Page
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Step-by-step solutions to odd-numbered problems from dozens of trigonometry textbooks.
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Hotmath
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A discussion of the names of the sides of a right triangle.
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Ask Dr. Math
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