amandasan98 amandasan98

18-03-2017
Mathematics

Answered

Use the fundamental identities to simplify the expression.

3tan(-x)cosx

Verified Answer :

jimthompson5910 jimthompson5910

18-03-2017

The identities we'll use are

tan(-x) = -tan(x)
tan(x) = sin(x)/cos(x)

which allows us to say...

3tan(-x)cos(x)
3(-tan(x))cos(x)
-3tan(x)cos(x)
-3(sin(x)/cos(x))cos(x)
-3sin(x)

The final answer is -3sin(x)

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