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can someone pls explain how 1 simplifies to 2 ?? like what to we rule out to get 2 i have an exam pls help thank you so much!!

can someone pls explain how 1 simplifies to 2 like what to we rule out to get 2 i have an exam pls help thank you so much class=

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sbcardinals
Alright so the best way I can say this is through an example.

Ex.

sin²(x) is equal to [sin(x)]² which is equal to sin(x)×sin(x)

Therefore the √sin²(x) = √[sin(x)]² which simplifies to sin(x)

This works with all trig functions


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