iphone – using cosine and sin to find missing angles – Education Career Blog

how can i use cosine and sine in my iphone application to find the missing value of angles?
if i have a float that contains a number, how can i get the cosine of that angle. i used this example however it gave me errors

        double x1float = (cos(pfloat));


What error does it give you? Did you include math.h, assuming this is C code?

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