Let f(x) = 2ln(cosx), find f''(x)

find sin 2x if tan x=2 cosx>0

cosx= -8/17, 180<x<270 find sin x/2= cos x/2= tan x/2=

If cosx= -2/3 and pi/2, find the exact value of cos(pi/3-x)

Find dy/dx, if y= 5e^x/cosx

. Try this. If y=cosx find dy/d5x please show workings #thanks

. If y=cosx, find dy/d5x please show workings #thanks

Find f′(x) if f(x)=(cosx)^x .

Using f(x)=−cosx+3, find the y-values in the second row by substituting each x-value into the functi...

Using f(x)=−cosx+3 , find the y-values in the second row by substituting each x-value into the funct...

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