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

Mathematics

2 answers:

alexandr402 [8]4 years ago

7 0

CosB = cos (π/2-A)
= sinA
=8/9

xeze [42]4 years ago

5 0

If the sin A = 8/9 then
Angle A = arc sine (8/9) =
62.734 Degrees

Angle B is the complement of Angle A and equals
90 -62.734 Degrees =
 27.266 Degrees

cosine ( 27.266 ) = 0.88889

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