If sinA =
3/4
, evaluate the cos A.
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Step-by-step explanation:
Sin A = 3/4
Sin theta = perpendicular/ Hypotenuse = P/H
According to Pythagoras theorem:
H^2= P^2+ B^2
4^2=3^2+B^2
B^2= 16-9
B=√7
Therefore Cos A= Base/ Hypotenuse= B/H
= √7/4
Hope this helps you
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