tigerstar34 tigerstar34

08-12-2017
Mathematics

contestada

Which expression is equivalent to (sin x + 1)(sin x − 1)?
A. cos2x
B. -cos2x
C. cos2x + 1
D. cos2x − 1
E. -cos2x + 1

Respuesta :

08-12-2017

Please be careful in the future regarding the options. These options look like cos of 2x, rather than cos(squared) of x.

The answer is B) -cos²(x)

(sin(x) + a) (sin(x) - a) = -cos²(x)

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dhevannnyahhh dhevannnyahhh

27-05-2021

Answer:

B.) -cos²(x)

Explanation:

PLATO

Answer Link

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