Which of the following are identities? A. sin6(x)=2sin3(X)cos3(x) B. (sin(x)+cos(x))^2=1+sin^2(x) C. sin3(x)-sin(x)/cos3(x)+cos(x)=tan(x) D. sin3(x)/sin(x)cos(x)=4cos(x)-sec(x)

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Which of the following are identities? A. sin6(x)=2sin3(X)cos3(x) B. (sin(x)+cos(x))^2=1+sin^2(x) C. sin3(x)-sin(x)/cos3(x)+cos(x)=tan(x) D. sin3(x)/sin(x)cos(x)=4cos(x)-sec(x)

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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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A for sure is one of the options...let me check the rest...
B false...
https://www.symbolab.com/solver/trigonometric-identity-calculator/Prove%20%5Cfrac%7Bsin3x-sinx%7D%7Bcos3x%2Bcosx%7D%3Dtanx/?origin=enterkey

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Other answers:

I got C
So it would be A and C
and D
I tried solving D on the website you o on and it said cannot solve :/
But okay A,C, and D
https://www.symbolab.com/solver/trigonometric-identity-calculator/Prove%20%5Cfrac%7Bsin3x%7D%7Bsinxcosx%7D%3D4cosx-secx/?origin=enterkey
I typed it the same way you did :/ that's weird
All were correct....
lol...ok im off to bed good night every one..except "B"
good night

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