Grade 12Algebra
If f(x) =cos[pi] x+cos[pi x], then find f(pi/2),where [.] denotes the greatest integer
If f(x) =cos[pi] x+cos[pi x], then find f(pi/2),where [.] denotes the greatest integer
1 Answer
Arun
Dear student
f(x)= cos 3x + cos [pi x]
Now f(pi/2) = cos 3pi/2 + cos [pi^2/2]
= cos 3 pi/2 + cos 4 = 0 + cos 4 = cos 4
Hope it helps
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