Question

If sinA=34 calculate cosA and tanA ​

Answer 1

Step-by-step explanation:

Given, sin A=3

4

=>BC = 3

DC= 4

=> BC = 3k and DC = 4k

where k is the constant of proportionality.

where k is the constant of proportionality.By Pythagoras theorem, we have

AB²= AC²---BC²= (4k²)-(3k²)= 7k²

=> AB=√7k

So, cosA= AB = √7k = √7

BC = 4k = 4

And tanA= BC = 3k = 3

AB= √7k= √7

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