# If <a name="MTBla

Given that, But  base = 12 and hypotenuse = 13

So, using Pythagoras theorem, we can say

(hypotenuse)2 = (perpendicular)2 + (base)2

(perpendicular)2 = (hypotenuse)2 – (base)2

(perpendicular)2 = (13)2 – (12)2

(perpendicular)2 = 169 – 144 = 25

perpendicular = √25 = 5

Using perpendicular = 5, base = 12 and hypotenuse = 13, we can find out sin A and tan A.

Sin A is given by  And, tan A is given by  Thus, and .

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