Mathematics

Mathematics, 01.01.2020 12:31, iisanchez27

Which expression is equivalent to cos(2α)cosα−sinα for all values of α for which cos(2α)cosα−sinα is defined?
select the correct answer below:

2

cosα+sinα

cot2α−2cos2α

2tanα1+tanα

2sinα1−tan2α

answer

Answers: 3

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