Prove each identity: a) 1-cos^2x=tan^2xcos^2x

Prove each identity:a) 1-cos^2x=tan^2xcos^2x b) cos^2x + 2sin^2x-1 = sin^2x I also tried a question on my own: tan^2x = (1 –
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2. asked by Kate
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Verify that each equation is an identity.cos^2x+tan^2xcos^2x=1
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2. asked by Jill
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By using the identity cos2A=1-2sin^2A show that cos4x = 1-8sin^2xcos^2x
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2. asked by Shauna
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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.
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2. asked by Anonymous
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cos^2xcos^2y+sin^2xsin^2y+sin^2xcos^2y+sin^2ycos^2x = 1
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2. asked by Kiely
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How would I do this problem?Verify that each equation is an identity. cos^2x+tan^2xcos^2x=1 the ^2 is just saying squared. ex.-
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2. asked by Jill
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Select all the true statements about identities.A) You may use proven identities to prove other identities. B) An identity is
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2. asked by TeeKay
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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
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2. asked by Tommy
3. 847 views
I'm sorry to double post; I don't want to seem impatient, but I really need help with this.Prove each idenity.
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2. asked by Rani
3. 829 views
Prove each idenity.1+1/tan^2x=1/sin^2x 1/cosx-cosx=sinxtanx 1/sin^2x+1/cos^2x=1/sin^2xcos^2x 1/1-cos^2x+/1+cosx=2/sin^2x and
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2. asked by Rani
3. 622 views