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Which of the following should be avoided when proving a trigonometric identity?
Rewriting all expressions in terms of Sine and Cosine.
Factoring
Using a common denominator
Multiplying each side by the same value

This is part of my homework and I can't contact my teacher for it so I need some help


Sagot :

Answer:

cosine

Step-by-step explanation:

fundamental trigonometric identities