Question

in the triangle ABC , angle B=90, AC=5cm, sin C=4/5. What is the length of AB?

Answer 1

Answer:

Correct option is

A

10cm

In ΔABC ,

∠B=90

∘

AB=5cm

sinC=

2

1

AC=?

Now,

sinC=

AC

AB

2

1

=

AC

5

AC=5×2=10cm

Answer 2

length of AB is 4 cm

ΔABC,

∠B = $90^0$ ( Given )

AC = 5 cm (Given)

Sin C =4/5 (Given)

Ab =?

Now, Sin c = AB/AC

4/5=AB/5

AB = 4 cm

Hence, the answer is 4 cm.

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