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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)
 11 months ago
 11 months 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)
 11 months ago
 11 months ago

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rebekita01Best ResponseYou've already chosen the best response.0
can someone help me
 11 months ago

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

.Sam.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 \[x^3\cos(2(x+1))\]
 11 months ago
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