Question

If 3tanA=4,then find sinA and cosA

Answer 1

3tanA = 4

tanA = 4/3

tan x = opposite side / adjacent side

opposite side = 4

adjacent side = 3

using Pythagorean theorem

(AB)^2 = (BC)^2 + (AC)^2

(AB)^2 = (4)^2 + (3)^2

(AB)^2 = 16 + 9

(AB)^2 = 25

AB = 5 -----> Hypotenuse

sin x = opposite side / hypotenuse

sinA = 4/5

cos x = adjacent side / hypotenuse

cosA = 3/5

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Answer 2

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