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12 February, 19:31

The value of sin^2 30° - cos^2 30° is

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Answers (1)
  1. 12 February, 21:06
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    -1/2

    Step-by-step explanation:

    Im not going to go into detail about how to compute sin30 and cos 30, but know that sine and cosine are just the ratios between the sides of a 30-60-90 triangle with a hypothenuse of 1.

    With that being said:

    sin^2 30 - cos^2 30

    = (1/2) ^2 - ((sqrt3) / 2) ^2

    = 1/4 - 3/4

    = - 1/2
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