• Math

  trigonometry

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

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

  Rajesh Saini replied 1 year, 9 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Rajesh Saini

  Member

  June 25, 2023 at 5:27 pm

  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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