If sin A = 3 divided by 5 which is the value of cos A?
Cos A = 4/5. This can be calculated using several different methods. Sin = Adjacent side of an angle ÷ hypotenuse. Cos = Opposite side of an angle ÷ hypotenuse. By Pythagoras : 52 = 32 + L2 : L2 = 25 - 9 = 16 : L = ?16 = 4. Therefore Cos A = 4/5. There is an identity Sin2A + Cos2A = 1 : (3/5)2 + Cos2A = 1 : Cos2A = 1 - 9/25 = 16/25 :Cos A = ?(16/25) = 4/5. ChaCha!
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About A5
The A5 is a compact luxury car that is produced by the German automaker Audi. The A5 is available as a coupe, convertible or sedan. The S5 model is an updated version of the A5 and the RS5 model is a top of the line high performance A5. The Audi A5 is known for its features, design and build quality.
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