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Math4Life Group Title

Use a half–angle identity to find the exact value of sin 105°

  • one year ago
  • one year ago

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  1. ParthKohli Group Title
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    \[\sin(90 + 15) = \sin(90)\cos(15)+\sin(15)\cos(90)\]The second term would cancel.

    • one year ago
  2. ParthKohli Group Title
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    I would use the half-angle identity to find \(\sin(15)\).

    • one year ago
  3. Math4Life Group Title
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    I'm confused, we haven't learned this yet, i'm doing extra credit where we do a practice on the next thing we learn that we haven't been taught yet to see how we do can you explain?

    • one year ago
  4. ParthKohli Group Title
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    Do you know what the half angle identity says?

    • one year ago
  5. Math4Life Group Title
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    what does it say?

    • one year ago
  6. ParthKohli Group Title
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    Sorry, was afk. I think it is a lot of typing so here: http://www.mathwords.com/h/half_angle_identities.htm

    • one year ago
  7. Math4Life Group Title
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    Trig identities that show how to find the sine, cosine, or tangent of half a given angle.

    • one year ago
  8. Math4Life Group Title
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    @ParthKohli You there? What's next?

    • one year ago
  9. ParthKohli Group Title
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    Use those to find \(\sin(15)\) from \(\sin(30)\).

    • one year ago
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