In Example 2, change the sign in the numerator to +. Data from Example 2 Simplify
Question:
In Example 2, change the − sign in the numerator to +.
Data from Example 2
Simplify
by expressing the result in terms of one-half the given angle. Then, using a calculator, show that the values are equal. We note that the given expression fits the form of the right side of Eq. (20.26), which means that
Using a calculator shows that
which verifies the equation for these values.
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Related Book For 
Basic Technical Mathematics
ISBN: 9780137529896
12th Edition
Authors: Allyn J. Washington, Richard Evans
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