tan(X+30)tan(30-x)=2cos2x-1 / (2cos2x+1) i just

f(x) = x² + 2Cos²x, find f ' (x)a) 2(x+cos x) b) x - sin x c) 2x + sin x d)2(x - sin2x) I got neither of these answers, since
1. 3 answers
2. asked by Terry
3. 1,049 views
Prove the identity:1-cos2x/sin2x = 1+tanx/1+cotx I simplified the RS to tanx. LS:(1-2cos²x+1)/2sinxcosx (2+2cos²x)/2sinxcosx
1. 2 answers
2. asked by sh
3. 1,321 views
which function has an amplitude of 2 and a period of p?a. f(x)=1/2cos2x b. f(x)=2cospx c. f(x)=1/2cospx d. f(x)=2cos2x
1. 2 answers
2. asked by kio
3. 3,416 views
tan(X+30)tan(30-x)=2cos2x-1 / (2cos2x+1)i just did (tanx)(-tanx)=-sin^2x/cos^2x would that work?
1. 2 answers
2. asked by Carry
3. 952 views
prove thatsin (60+x) sin (420-x) = 1+ 2cos2x/2
1. 1 answer
2. asked by Anonymous
3. 381 views
Find the first four derivatives :i.) y = x^-3 + 3x^3 + 6x^2 ii.) y = - (3/x) iii.) y = 2cos2x
1. 1 answer
2. 32 views
Find the first four derivatives :i.) y = x^-3 + 3x^3 + 6x^2 ii.) y = - 3/x iii.) y = 2cos2x
1. 1 answer
2. 26 views
Solve for X:5sinx+2cos2x-3=0
1. 2 answers
2. asked by =
3. 803 views
how does 2cos^2 x - 2sin^2 x = 2cos2x
1. 1 answer
2. asked by Ashlynn
3. 439 views
Solve the equation for all values of x.-2cos²x-sin x+1=0, on the interval [0,2π).
1. 1 answer
2. asked by AwesomeGuy
3. 601 views