Question

if cosA=4/5 then find the value of tan


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Answer 1

Answer:

if cos a = 4/5

cosa = adjacent/hypotenuse

by Pythagoras theorem

opposite side can be found

(5)^2= (4)^2+ (opposite side)^2

25=16+(opposite side)^2

(opposite side)^2=9

opposite side=3

tana=opposite side/adjacent side

tana=3/4