How much is 1-cos 2x=?

Lucille Douglas 2022-09-13 Answered
How much is 1 cos 2 x =?
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Answers (1)

Raina Russo
Answered 2022-09-14 Author has 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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