9th Standard English Medium Maths Subject Trigonometry Book Back 3 Mark Questions with Solution Part - I

9th Standard

    Reg.No. :
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Maths

Time : 01:00:00 Hrs
Total Marks : 30

    3 Marks

    10 x 3 = 30
  1. For the measures in the figure, compute sine, cosine and tangent ratios of the angle \(\theta \)

  2. Find the six trigonometric ratios of the angle \(\theta\) using the given diagram.

  3. If tan A  = \(\frac { 2 }{ 3 } \) , then find all the other trigonometric ratios.

  4. If sec \(\theta\) = \(\frac { 13 }{ 5 } \), then show that \(\frac { 2sin\theta -3cos\theta }{ 4sin\theta -9cos\theta } \) = 3

  5. Express
    (i) sin 74° in terms of cosine
    (ii) tan 12° in terms of cotangent
    (iii) cosec 39° in terms of secant

  6. Evaluate:
    (i) \(\frac { sin\ 49° }{ cos\ 41° } \) 
    (ii) \(\frac { sec\ 63° }{ cosec\ 27° } \)

  7. Find the values of
    (i) tan7° tan23° tan60° tan67° tan83°  
    (ii) \(\frac { cos35° }{ sin55° } +\frac { sin12° }{ cos78° } -\frac { cos18° }{ sin72° } \)

  8. (i) If cosec A = sec 340, then find A
    (ii) If tan B = cot 470, then find B.

  9. Find the value of sin 64034'.

  10. Find the value of cos19059'

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