Simplify the given expressions by using one of the basic formulas of the chapter. Then use a
Question:
Simplify the given expressions by using one of the basic formulas of the chapter. Then use a calculator to verify the result by finding the value of the original expression and the value of the simplified expression.
cos3°cos215° − sin3°sin 215°
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The given expression is cos3cos215 sin3sin 215 We can simplify it using the ...View the full answer
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Related Book For 
Basic Technical Mathematics
ISBN: 9780137529896
12th Edition
Authors: Allyn J. Washington, Richard Evans
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