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Prove the identity. 6cos^2(x)-1 -12cos^4(x)

Prove the identity.6cos^2(x)-1 -12cos^4(x) +8cos^6(x)= cos^3(2x) Thanks for your help :)
1. 3 answers
2. asked by Tommy
3. 587 views
Prove the identity: cos^4(x)-sin^4(x)=1-2sin^2(x).with explanationim confused on this one cause of the 4th power of the sine.
1. 1 answer
2. asked by Anonymous
3. 644 views
Prove That 2sin^pi/6 + cosec^7pi/6cos^pi/3 = 3/2
1. 1 answer
2. asked by Anonymous
3. 482 views
Hi! The question I need help with is 6cos^2x-3 and the directions say to use a double-angle formula to write the expression.
1. 2 answers
2. asked by Penny
3. 564 views
Use a trig identity to combine two functions into one so you can solve for x. (The solution should be valid for any value of t).
1. 1 answer
2. asked by Lisa
3. 618 views
Select all the true statements about identities.A) You may use proven identities to prove other identities. B) An identity is
1. 0 answers
2. asked by TeeKay
3. 722 views
Prove the identitysin(x+y+z)+sin(x+y-z)+sin(x-y+z)+ sin(x-y-z) = 4 sin(x)cos(y)cos(z) This identity is so long and after i tried
1. 5 answers
2. asked by Tommy
3. 829 views
Prove this identity using the product-to-sum identity for sine:sin^2 x=1-cos(2x)/2
1. 1 answer
2. asked by Kyle
3. 748 views
According to research in South Africa and overseas, which identity status is most likely to be formed in adolescents from more
1. 1 answer
2. 29 views
The identity below is significant because it relates 3 different kinds of products: a cross product and a dot product of 2
1. 1 answer
2. asked by Anonymous
3. 1,175 views