SOLUTION: Write the expression as the sine or cosine of an angle.
cos 5x cos 7x-sin 5x sin 7x
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Question 1138524: Write the expression as the sine or cosine of an angle.
cos 5x cos 7x-sin 5x sin 7x
Found 2 solutions by MathLover1, ikleyn:
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
Answer by ikleyn(52814) (Show Source): You can put this solution on YOUR website!
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I solved it YESTERDAY under this link
https://www.algebra.com/algebra/homework/Trigonometry-basics/Trigonometry-basics.faq.question.1138431.html
https://www.algebra.com/algebra/homework/Trigonometry-basics/Trigonometry-basics.faq.question.1138431.html
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