3 years ago

Which expression is equivalent to (cos x)(tan(–x))?

2 answers:

7 0

The tan(-x) is the same thing as -tan(x). The tangent function is also the same thing as sin(x)/cos(x), right? So let's rewrite that tan in terms of sin and cos:
$[cos(x)][tan(-x)]$ is the same as $[cos(x)][ -\frac{sin(x)}{cos(x)}]$
We can now cancel out the cos(x), which leaves us only with -sin(x) remaining. So your answer is A.

GalinKa [24]3 years ago

7 0

The answer to this is A

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