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jpsteezy

  • 3 years ago

is sin^2x-1 an identity? If so, does it equal -1?

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  1. Azteck
    • 3 years ago
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    Draw out your expression again please.

  2. mathsmind
    • 3 years ago
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    cos^2(x) + sin^2(x)=1

  3. mathsmind
    • 3 years ago
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    cos^2(x) = 1 - sin^2(x)

  4. mathsmind
    • 3 years ago
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    or -cos^(x) = sin^2(x)-1

  5. mathsmind
    • 3 years ago
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    -(cos^2(x) + sin^2(x) ) = -1

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