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rebekita01
 one year ago
Simplify using the doubleangle formula: x3  2x3 sin2 (x + 1).
A. x3 cos (x + 1)
B. x3 cos (2x + 1)
C. x3 cos 2(x + 1)
D. x3 cos2 (x + 1)
rebekita01
 one year ago
Simplify using the doubleangle formula: x3  2x3 sin2 (x + 1). A. x3 cos (x + 1) B. x3 cos (2x + 1) C. x3 cos 2(x + 1) D. x3 cos2 (x + 1)

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rebekita01
 one year ago
Best ResponseYou've already chosen the best response.0can someone help me

sasogeek
 one year ago
Best ResponseYou've already chosen the best response.0I can't help you with this one, but I'll try to find someone else who can :) alright?

.Sam.
 one year ago
Best ResponseYou've already chosen the best response.2\[x^3  2x^3 \sin^2 (x + 1)\] First factor out \(x^3\) \[x^3(12\sin^2(x+1))\] let u=x+1 \[x^3(12\sin^2(u))\] Using identity \[\cos(2u)=12\sin^2(u),\]we have \[x^3\cos(2u)\] Then \[x^3\cos(2(x+1))\]
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