real function

what is the answer of f(x)=cos[¶^2]x+cos[-¶^2]x , where[.] stands for the greatest integer function?
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???? iz zat straenj simbel spozed tu be Pi ???????

so yu want kosine(pi*pi) ????????

pi=3.14159 26535 89793 23846 26433 83279...redians

pi squared=9.869604401089358 rads

me need tu konvert tu degrees per 57.29577 95130 82320 87679... deg per rad

me get 565.4866776461628 degrees

but then neen tu subtrakt integer multipel av 2pi...360 deg.

565.486677-360=205.486677 deg

kosine(205.486677 deg)=-0.9026853667858655

??????? gratest integer av the angel ???, maebee yu meen

round up...such as 206 deg?????
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