How much is 1-cos 2x=?

Lucille Douglas

Lucille Douglas

Answered question

2022-09-13

How much is 1 cos 2 x =?

Answer & Explanation

Raina Russo

Raina Russo

Beginner2022-09-14Added 20 answers

1 cos ( 2 x ) ;
the unit can be expanded according to the basic trigonometric identity:
sin 2 ( a ) + cos 2 ( a ) = 1 ;
and the cosine of a double angle according to the corresponding formula:
cos ( 2 x ) = cos 2 ( a ) sin 2 ( a ) ;
We get:
sin 2 ( a ) + cos 2 ( a ) ( cos 2 ( a ) sin 2 ( a ) ) ;
sin 2 ( a ) + cos 2 ( a ) cos 2 ( a ) + sin 2 ( a ) = 2 sin 2 ( a ) .

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