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Activity Discussion Math trigonometry

  • trigonometry

    Posted by Geethika on June 24, 2023 at 9:14 pm

    If Sin A = 3/4, Calculate cos A and tan A.

    Rajesh replied 12 months ago 2 Members · 1 Reply
  • 1 Reply
  • Rajesh

    Member
    June 25, 2023 at 5:27 pm
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    ::

    SinA = 3/4 ( given)

    We know that sin^2 A + cos^2 A = 1

    (3/4)^2 + cos^2 A = 1

    9/16 + cos^2 A = 1

    Cos^2 A = 1 – 9/16

    Cos^2 A = (16-9)/16

    Cos^2 A = 7/ 16

    CosA = ✅7 / 4

    And

    tan A = sinA / cos A

    tan A = (3/4) / ( ✅7 / 4)

    tan A = 3/✅7

    Hence , cosA = ✅7 / 4 and tan A = 3/✅7

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