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son4ous [18]
4 years ago
8

In triangleABC, C is the right angle. If tanA = 8/6, find cosB

Mathematics
1 answer:
klemol [59]4 years ago
4 0

<u>Short answer</u> = C) 8/10

<u>Working :</u>

Tan A = 8/6 = Opposite / AdjacentOpposite = 8 units

Adjacent = 6 units

Hypotenuse = \sqrt{8^{2} + 6^{2} }

                     = \sqrt{64 + 36 }

                     = \sqrt{100}

                     = 10 units

Cos B  = Adjacent/ Hypotenuse

        ∴  cos B= 8/10

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