![If f (x) = cos [ pi ^ 2 ] x + cos [ - pi ^ 2 ] x where. [ . ] stands for the greatest integer function then which of the following is wrong. If f (x) = cos [ pi ^ 2 ] x + cos [ - pi ^ 2 ] x where. [ . ] stands for the greatest integer function then which of the following is wrong.](https://haygot.s3.amazonaws.com/questions/1983248_1180018_ans_5d401a30a76a471092f1bd3d399a3b3d.jpg)
If f (x) = cos [ pi ^ 2 ] x + cos [ - pi ^ 2 ] x where. [ . ] stands for the greatest integer function then which of the following is wrong.
![Let f(x) = [cosx], -pi less than or equal to x less than or equal to pi a) Sketch the graph of f. b) Evaluate each limit, if it exists. 1. limit_{x Let f(x) = [cosx], -pi less than or equal to x less than or equal to pi a) Sketch the graph of f. b) Evaluate each limit, if it exists. 1. limit_{x](https://homework.study.com/cimages/multimages/16/4864545744549703535245.png)
Let f(x) = [cosx], -pi less than or equal to x less than or equal to pi a) Sketch the graph of f. b) Evaluate each limit, if it exists. 1. limit_{x
![real analysis - Prove that, $\cos x\ge1-{2x\over\pi}\ \forall x\in[0,{\pi\over2}]$ - Mathematics Stack Exchange real analysis - Prove that, $\cos x\ge1-{2x\over\pi}\ \forall x\in[0,{\pi\over2}]$ - Mathematics Stack Exchange](https://i.stack.imgur.com/wunIp.png)