Sine, cosine and tangent in Swift
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let sin90 = sin(M_PI/2)
//sin90 is 1.0
let cos180 = cos(M_PI);
//cos180 is -1.0
let tan45 = tan(M_PI/4);
//tan45 is 1.0
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let sin90 = sin(M_PI/2)
//sin90 is 1.0
let cos180 = cos(M_PI);
//cos180 is -1.0
let tan45 = tan(M_PI/4);
//tan45 is 1.0