- 1+cosx=2cos^2(x/2)?

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Convert 8km to centimeters? How can I prepare for IIT JEE chemistry? Sodium phosphat, Na3PO4, can be? Why does thunder sound exactly like a bowling ball rolling down the bowling alley? Suppose that the x-intercepts of the graph of y=f(x) are 3 and 5.
What are the x-intercepts of the graph of y= 9f(x)? ?