sin (16 $\pi$ /x )= 0
Exercise. Determine whether the following argument is valid.
Either John is not smart and he is lucky, or John is smart.
John is...
56x^2-12x+x^4-15=0
sin (16 $\pi$ /2 )= 0
sin 16 $\pi$ /2
2+4-23%2+12
8.40 is what percent of 8?
1/0.025
x+7:2(x+14) in the duplicate ratio of 5:8, find x