Grade 12Algebra
If f(x) =cos[pi] x+cos[pi x], then find f(pi/2),where [.] denotes the greatest integer.
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1 Answer
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Approved Tutor Answer9 Years agof(x)=cos[pi]x+cos[pix]f(pi/2)=cos[pi]pi/2+cos[pi*pi/2]Since pi=3.14 its integral part is 3So,cos3pi/2+cos[4.something]0+cos4Ans. Cos 4
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