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Show that 1-cos2A/Cos^2*A = tan^2*A

  1. Show that 1-cos2A/Cos^2*A = tan^2*A1-cos2A/Cos^2*A = [Cos^2(A) - Cos(2A)]/Cos^2(A). Substitute: Cos(2A) = 2Cos^2(A) - 1: [1 -
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    2. Paul C asked by Paul C
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  2. show that:2^5 cos^2a sin^4a = cos6a-2cos4a- cos2a + 2
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    2. Anonymous asked by Anonymous
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  3. show that:2^5 cos^2a sin^4a=cos6a-2cos4a- cos2a + 2
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    2. Anonymous asked by Anonymous
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  4. For the function f(x)=sinx, show with the formula sin^2A=1/2(1-cos2A) that f(x+y)-f(x)=cosxsiny-2sinxsin^2(1/2y)
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    2. Anonymous asked by Anonymous
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  5. 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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  6. Let A=(cosA -sinA)(sinA cosA) show that A^2=(cos2A sin2A) (sin2A cos2A)
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    2. James asked by James
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  7. how do you solve this.prove: cos2A plus cosA divided by sin2A minus sinA equal to cos2A plus 1 divided by sinA
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    2. lungisile ntobela asked by lungisile ntobela
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  8. Prove:1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA
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    2. Piwo asked by Piwo
    3. views icon 1,201 views
  9. Prove:1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA
    1. answers icon 1 answer
    2. Piwo asked by Piwo
    3. views icon 610 views
  10. cos²a + cos²(a+120°) + cos(a-120°) = 3/2
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    2. Kewal asked by Kewal
    3. views icon 1,479 views