Verify Identity: cos5x-cos3x=-8sin^2x(2cos^3x-cosx)

Verify Identity:cos5x-cos3x=-8sin^2x(2cos^3x-cosx)
1. 1 answer
2. asked by Erik
3. 563 views
Verify the identity:tanx(cos2x) = sin2x - tanx Left Side = (sinx/cosx)(2cos^2 x -1) =sinx(2cos^2 x - 1)/cosx Right Side = 2sinx
1. 0 answers
2. asked by Ashley
3. 1,245 views
i have a few questionscosx + cosx =2secx ----- ----- 1+sinx 1-sinx cos(x-B)-cos(x-B) = 2sinxsinB csc2x= 1 secx cscx --- 2 cotx=
1. 4 answers
2. asked by jessika
3. 1,259 views
Verify the following identity.1) sin(x+y) __________ = tanx+tany cosxcosy 2) Write cos3x in terms of cosx I cannot figure out
1. 0 answers
2. asked by ALISON
3. 613 views
how do you verify cos3x=4cos^3x-cosx???
1. 0 answers
2. asked by lindsey edler
3. 733 views
Having trouble with this problem:Rewrite the expression as an equivalent expression that does not contain powers greater than 1.
1. 2 answers
2. asked by Brian
3. 1,444 views
Verify the identity:sin^(1/2)x*cosx - sin^(5/2)*cosx = cos^3x sq root sin x I honestly have no clue how to approach the
1. 1 answer
2. asked by Zee
3. 722 views
Simplify:(cosx + cos2x + cos3x + cos4x + cos5x + cos6x) / (sinx + sin2x + sin3x + sin4x + sin5x + sin6x) into a single Cotangent
1. 2 answers
2. asked by Jeff
3. 1,710 views
verify the identitysin x(1 - 2 cos^2 x + cos^4 x) = sin^5 x 1-2cos^2 x looks like 2cos^2x-1 its just backwards. I am not sure
1. 1 answer
2. asked by Hannah
3. 711 views
prove the identity(sinX)^6 +(cosX)^6= 1 - 3(sinX)^2 (cosX)^2 sinX^6= sinx^2 ^3 = (1-cosX^2)^3 = (1-2CosX^2 + cos^4) (1-cosX^2)
1. 0 answers
2. asked by JungJung
3. 912 views