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Prove the identity: 4x=1-8sin^2x+8sin^4x

  1. Prove the identity:4x=1-8sin^2x+8sin^4x
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    2. PRELUDE asked by PRELUDE
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  2. please help me on the following:prove the identity. cos4x = 1-8sin^x2cos^2x
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    2. John asked by John
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  3. please help me on the following:prove the identity. cos4x = 1-8sin^x2cos^2x
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    2. John asked by John
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  4. If we are given 8sin((pi/6)(x+2))+16=20the answers are -1 and 3 because 1/2 can be pi/6 or 5pi/6. However, if y = 10
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    2. Ashley asked by Ashley
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  5. Please take a look at DEVON's trig equation at 9:14I must be missing something obvious. If the second had been 3sin 2x it would
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    2. Reiny asked by Reiny
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  6. Prove 8sin^5x=sinx(3-4cos(2x)+cos(4x))
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    2. Larry Wheels asked by Larry Wheels
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  7. By using the identity cos2A=1-2sin^2A show that cos4x = 1-8sin^2xcos^2x
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    2. Shauna asked by Shauna
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  8. Verify Identity:cos5x-cos3x=-8sin^2x(2cos^3x-cosx)
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    2. Erik asked by Erik
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  9. Prove that in any triangle ABC Sin2A+Sin2B+Sin2C/SinA+SinB+SinC=8Sin(A/2)Sin(B/2)Sin(C/2)
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    2. joel asked by joel
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  10. 8sin^4(x)
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    2. Anonymous asked by Anonymous
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