Asked by Daisy
which expression is equivalent to (sinx+1)(sinx-1)?
A.) COS^2X
B.) -COS^2X
C.) COS^2X+1
D.) COS^2X-1
E.) -COS^2X+1
A.) COS^2X
B.) -COS^2X
C.) COS^2X+1
D.) COS^2X-1
E.) -COS^2X+1
Answers
Answered by
Steve
recall that sin^2 + cos^2 = 1
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