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Pre-Calculus: Simplifying Using Trig Identities for a bundle of videos on . For an even broader bundle of videos that cover and , check out . To search for topic-specific help in our library of 400+ video products for Trigonometry & Pre-Calculus, please refer to our Trigonometry category at: and our Calculus Category at . To check out our full Trig & Pre-Cal video course, with 150 videos included, refer to: . Or, for access to this single video, go to: Professor Burger demonstrates how to use the fundamental trigonometric identities to simplify complex triognometric expressions. Many seemingly complex expressions can be greatly simplified with simple application of several trigonometric identities. You will prectice using expressions such as tanx * cosx and [1+(tan^2)x]/(csc^2)x. In these problems, you will see how substituting 1/cos^2 for sec^2 or 1/sin for csc or sin/cos for tan. By applying the definitions of the different trig functions, you'll often be able to substantially simplify a problem to the point where it will be very easy for you to evaluate and solve it. Taught by Professor Edward Burger, this lesson was selected from a broader, comprehensive course, Precalculus.
Length: 02:21


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