In ABC,if sin A=4/5 and tan A =4/3,then what is cosA?
Answer:
Cos A = 3/5
Step-by-step explanation:
Step 1: define the functions
Sine A= Opp/Hyp
sin A=4/5
I.e. Opp = 4,; Hyp = 5
tan A =4/3
Tangent A= Opp/Adj
I.e. Opp = 4,; Adj= 3
Step 2. Define Cosine and solve for Cos A.
Cosine A = Adj/Hyp
From the Above substitute the given sides
I.e. adj= 3; Hyp = 5
Therefore
Cos A = 3/5
