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11th Standard English Medium Business Maths Subject Trigonometry Creative 5 Mark Questions with Solution Part - II

11th Standard

    Reg.No. :
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Business Maths

Time : 00:30:00 Hrs
Total Marks : 25
    5 x 5 = 25
  1. Prove that \(\frac { 4tan\ x(1-{ tan }^{ 2 }x) }{ 1-6{ tan }^{ 2 } x+{ tan }^{ 4 } x } =tanx\)

  2. Prove that (sin 3x + sin x) sin x + (cos 3x - cos x) cos x = 0.

  3. Prove that sin(n+1)x sin(n+2) x+cos(n+1)xcos(n+2)x=cosx.

  4. If tan x = \(\frac { -4 }{ 3 } \) and x is in II quadrant,find \(sin\frac { x }{ 2 } ,cos\frac { x }{ 2 } \) and \(tan\frac { x }{ 2 } \)

  5. Prove that cos22x - cos26x = sin 4x.sin 8x

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