Question

In triangle ABC, AB = AC = 15 cm and BC = 18 cm, find cos angle ABC.

Answer 1

Here, Base(BC)= 18cm
Perpendicular(AC) = 15cm
Hypotenuse(AB) = 15cm
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value of cos B= 6/5
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Hope this will help you....

Answer 2

Here, Base(BC)= 18cm

Perpendicular(AC) = 15cm

Hypotenuse(AB) = 15cm

Cos B =BC/AB =18/15=6/5

value of cos B= 6/5