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

11th Standard

    Reg.No. :
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Business Maths

Time : 00:30:00 Hrs
Total Marks : 15
    5 x 3 = 15
  1. If \sin { A } =\frac { 3 }{ 5 } , find the values of cos 3A and tan 3A.

  2. Prove that sin600o cos 390o + cos 480o sin 150o = –1

  3. Find the values of each of the following trigonometric ratios –sec165o

  4. If tanA =\frac{1}{7} and tanB =\frac{1}{3}, show that cos2A = sin4B

  5. If tan \alpha =\frac{1}{2}and tan \beta = \frac{1}{7}then prove that (2\alpha+\beta) = \frac{\pi}{4}.

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