Prove the identity. (must work

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. 702 views
Prove the identity. (show your work please)tan(x − π/4)= (tan x − 1)/(tan x + 1) Thank you!
1. 1 answer
2. asked by Anonymous
3. 1,025 views
Prove the identity. (show your work please)tan(x − π/4)= (tan x − 1)/(tan x + 1) Thank you!
1. 1 answer
2. asked by Kate
3. 437 views
Prove the identity. (must work with left side)(1-2sin(x)^2)=(cos(x)^2)
1. 1 answer
2. asked by mailon
3. 498 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. 774 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. 885 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. 784 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. 59 views
prove that 5x - 7 - sin3x = 0 has at least one zero and prove that it has exactly one real zero.How am I supposed to show my
1. 1 answer
2. asked by Rob
3. 701 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. 1,238 views