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Program to find sine of a given angle

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C      Program to find sine of a given angle
        write(*,*)'Enter the angle in degree:'
        read(*,*)y
        sum=0.0
        term=1.0
        i=1
        s=1.0
        x=(acos(-1.0)*y)/180.0
        dowhile (abs(term).ge.1.0E-6)
        term=(x**i/fact(i))*s
        sum=sum+term
        i=i+2
        s=-s
        end do
        write(*,10)y,sum
 10   format(2x,'The value of sin',f16.2,' is',f16.4)
        end
        
C      Program sub function
        function fact(i)
        fact=1
        do j=1,i
        fact=fact*j
        end do
        return
        end
        
       
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