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what is the introduction of rigt triagle ABC can be used to express the values of the trigonometric ratios in terms of the sides of the triagle,where;

 

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Hargy1212viz
Let:
A = opposite side of triangle
B = adjacent side of triangle
C = hypotenuse side of triangle

C = √ A^2 + B^2

sin θ =   opposite    = A          
            Hypotenuse   C
cos θ =   adjacent  =   B            
            Hypotenuse    C
tan θ =  opposite  =  A              
             adjacent      B