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A continuous, even periodic function f with period 8 is such that f(0) = 0, f(1) = –2, f(2) = 1, f(3) = 2, f(4) = 3, then the value of cos–1(cos(f(9) + 2f(20))) is equal to |
| Answer» A continuous, even periodic function f with period 8 is such that f(0) = 0, f(1) = –2, f(2) = 1, f(3) = 2, f(4) = 3, then the value of cos–1(cos(f(9) + 2f(20))) is equal to | |