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jfvjhsljdl jfvjhsljdl
  • 02-01-2018
  • Mathematics
contestada

In right triangle ABC, A and B are complementary angles and sin A = 8/9 . What is cos B? NextReset

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tynollette tynollette
  • 02-01-2018
A and B are complementary, that means m∠A+m∠B=90
Recall that sinA=cos(90-A), if sinA=8/9, cos(90-A) is also 8/9
therefore, cosB=cos(90-A)=sinA=8/9
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mansoorahmedd67
mansoorahmedd67 mansoorahmedd67
  • 24-10-2018

cos B is 8/9 too......................

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