Question

how to change of cos4/5 to sin 3/5​

Answer 1

Step-by-step explanation:

If cos is 4/5,

Adjacent side if 4 and hypotenuse is 5

Let the perpendicular be x

Therefore, by applying Pythagoras theorem,

4²+x²=5²

x²=4²-5²=(4+5)(4-5)=9

x=√9=3

Sin= Perpendicular/ Hypotenuse=3/5

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