if sin(x+⁡α)=2cos(x-b) show tan x such that : tan x=(2-tan⁡ α)/...

Given f(x)=sin(x)-2cos(x) on the interval [0,2pi]. Determine where the function is concave up and co...

Show that the limit for [x^2cos(1/x)]=0 as x approaches 0. How would I solve this algebraically?

1 + SIN X=2COS X

2cos(45)-tan(45)/90.5-64 =?

If x=2cos (z) and y= sin (z), then d^2y/dx^2=? What I got -sin (z) / -8cos (z)*sin (z) simplifie...

y=1/2cos[1/2(x-30)]-5 has a transformed point of

y=1/2cos[1/2(x-30)]-5 has a transformed point of a. (465,-5.5) b. (390,-5.5) c. (285,-5.5) d....

y=1/2cos[1/2(x-30)]-5 has a mapping rule of a. (1/2x-30, 1/2y-5) b. (2x-30, 1/2y-5) c. (2x-30, 2y...

how does 2cos(2x)-2cos(x)sin(x) becomes 2cos(2x)-sin(2x)?

dy/dx = (1+2cos^2(x))/y, (y > 0), y = 1 when x = 0

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