SOLUTION: Write the expression as the sine or cosine of an angle. cos 5x cos 7x-sin 5x sin 7x

Algebra ->  Trigonometry-basics -> SOLUTION: Write the expression as the sine or cosine of an angle. cos 5x cos 7x-sin 5x sin 7x      Log On


   

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) About Me  (Show Source):
Answer by ikleyn(52814) About Me  (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