Question

if cosA = 12/13 , then find sinA and tanA . if you keep wrong answer i will report it

Answer 1

Using Pythagoras theorem,

(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

⇒perpendicular/hypotenuse

= 5/13

And, tan A is given by

⇒perpendicular/base

= 5/12

Thus,

Sin A = 5/13

and

Tan A = 5/12

hope it helps

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Answer 2

Answer:

look at attachment above and it helps