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anonymous
 one year ago
Which expression is equivalent to (sin x + 1)(sin x − 1)?
anonymous
 one year ago
Which expression is equivalent to (sin x + 1)(sin x − 1)?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0cos2x cos2x cos2x + 1 cos2x − 1 cos2x + 1

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1dw:1434123061043:dw multiply

P0sitr0n
 one year ago
Best ResponseYou've already chosen the best response.0First expand, then you can draw a conclusion: \[sin^2x1=(1cos^2x)1=cos^2x\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1nope how did you get that ?

P0sitr0n
 one year ago
Best ResponseYou've already chosen the best response.0also the expression is simply a difference of squares, so use the identity \[ (ab)(a+b)=a^2b^2\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i am so confused if i foil i get D but you said no

P0sitr0n
 one year ago
Best ResponseYou've already chosen the best response.0\[sin^2x+cos^2x=1\] use that

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1foil yes what did you get after this ??

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right now apply that identity sin^2 x + cos^2x =1 solve for sin^2x

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1\[\large\rm sin^2 x = 1cos^2\] trig identity agree or no?
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