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Sin squared, cos squared...you removed the x in the equation.

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Q: What is sin squared x minus cos squared x?
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How do you show that 2 sin squared x minus 1 divided by sin x minus cos x equals sin x plus cos x?

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Since the word 'equals' appears in your questions it might be what is called a trigonometric identity, in other words a statement about a relationship between various trigonometric values.


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