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11th Standard English Medium Maths Subject Trigonometry Creative 3 Mark Questions with Solution Part - II

11th Standard

    Reg.No. :
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Maths

Time : 01:00:00 Hrs
Total Marks : 15

    3 Marks

    5 x 3 = 15
  1. Solve: sin 2x + cos x = 0

  2. Prove that \(\tan ^{ -1 }{ \left( \frac { x }{ \sqrt { { { a }^{ 2 }-{ x }^{ 2 } } } } \right) } =\sin ^{ -1 }{ \left( \frac { x }{ a } \right) } \)

  3. Prove that 4 cos 12° cos 48° cos 72° = cos 36°

  4. Prove that cos 20° cos 40° cos 60° cos 80°

  5. Prove that \(\frac{sin11AsinA+sin7Asin3A}{cos11AsinA+cos7Asin3A}=tan8A\)

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