(v)cos(2x^(2)-1)

Let f(x)=(2cos x-1)(2cos2x-1)(2cos2^(2)x-1)...(2cos2^(n)x-1) (where n>=1). Then prove that f((2 pi k)/(2^(n)+-1))=1AA k in I

2cos^(-1)x=cos^(-1)(2x^(2)-1)

Let f(x)=cos^(-1)(2x^(2)-1) then

int cos^(-1) (2x^(2)-1)dx =

int Cos^(-1)(2x^(2)-1)dx=

|(sin^(2)x,cos^(2)x,1),(cos^(2)x,sin^(2)x,1),(-10,12,2)|=

If int sqrt(1+sec x)dx=2sin^(-1)[sqrt(2)f(x)]+c then (d)/(dx)[f(x)] is equal to (A)cos(x)/(2)(B)-(1)/(2)cos(x)/(2)(C)(1)/(2)cos(x)/(2)(D)(1)/(2)sin(x)/(2)

Show that underset(xrarr0)"lim"(xtan2x-2xtanx)/((1-cos2x)^(2))=(1)/(2)

Draw the graph of the following y = cos^(-1) ( 2x^(2) - 1)