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How can i make the left side equal to the other? (sinx-cosx) (sinx+cosx)=1-2cos^2x?

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  • How can i make the left side equal to the other? (sinx-cosx) (sinx+cosx)=1-2cos^2x?


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Does cosx + sinx = 1? Tweet ... this is because the square root of sin^2x+cos^2x =/= sinx+cosx ... and sin^2 (x)) are a bracket, you can't just square root ...
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Positive: 61 %
... {\sin {x}} {1 - \cos {x}}\ = \csc x + \cot x$ I got the left side to $\frac ... The right-hand side can be ... Browse other questions tagged ...
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Positive: 58 %

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1+sinx/cosx + cosx/1+six = 2secx 1+sin ... common denominator for the left side is cosx(1+sinx) ... (1+sinx)2/ ... Make it readable.
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Positive: 61 %
... we take LCM of the terms on the left hand side of the equation. We get (sinx ... sinx cosx +sinx ... 2x) which is equal to the right hand side ...
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Positive: 56 %
What we can do, ... as x approaches 2 from the left does not equal f(2), however, ... since both sides approach different values. Visually, , , ...
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Positive: 42 %
Provides worked examples showing useful techniques for proving trig identities. ... is always equal to 1, so I can ignore ... on the other side? I can ...
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Positive: 19 %

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