In triangle ABC measure angle bA =90° and if AH:BC =1:2 find SinB, CosC ,TanC
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《A=90°
AB:BC=1:2
Let AB=x
BC=2x
CA=
(Pythagoras theorem)
SinB=CA/BC
=√3x/2x=√3/2
Cos C=√3/2
TanC=1/√3
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