Question

if 3 tanA=4 then find sinA and cos A​

Answer 1

Answer:

sinA = 4/5

Step-by-step explanation:

cosA= 3/5

hope it will help you.

Answer 2

Given

3tanA = 4

To Find

Value of sinA and CosA

Now Take

3tanA = 4

tanA = 4/3

We Know that

tanA = Perpendicular/ Base

We get

Perpendicular(p)=4 , Base(b) = 3  and Hypotenuse(h) = x

Now we Use Pythagoras Theorem

h² = p² + b²

h² = (4)² + (3)²

h² = 16 + 9

h² = 25

h = 5

We get    

Perpendicular(p)=4 , Base(b) = 3  and Hypotenuse(h) = 5

So,

SinA = p/h = 4/5

cosA = b/h = 3/5

Answer

SinA  = 4/5

cosA  = 3/5