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What is [1/cos(x)-sin(x) times tan(x)]/cos²(x)? I made a typo earlier, excuse me. I still don’t understand how to do this. Find b such that f(x)=-4(x^2)+bx+3 has a maximum value of 50? Found in the bladder lining peculiar cell that slide over one another? Classify proteins on the basis of phyiscal and chemical porproties? I went in for a procedure, a same day surgery. Dr found a tumor and im scheduled for surgery tomorrow. Does this mean its serious?