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RonnyDeKoning

  • 2 years ago

Geomerty

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  1. RonnyDeKoning
    • 2 years ago
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    |dw:1353250334560:dw|

  2. Skaematik
    • 2 years ago
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    i can't read it

  3. rizwan_uet
    • 2 years ago
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    |dw:1353251965656:dw|

  4. RonnyDeKoning
    • 2 years ago
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    Sin 7,5° * sin 37,5 ° * sin 52,5° * sin 82,5°

  5. rizwan_uet
    • 2 years ago
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    use calculator

  6. RonnyDeKoning
    • 2 years ago
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    That is the point, you may not.

  7. gohangoku58
    • 2 years ago
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    sin (90-x)=cos x, sin 2a = 2 sin a cos a Sin 7,5° * sin 37,5 ° * sin 52,5° * sin 82,5° = 1/4(2sin 7.5 cos 7.5 * 2 sin37.5 cos 37.t ) = 1/4(sin 15 sin 75) =1/8(2sin 15 cos 15) =1/8(sin 30) =1/16

  8. RonnyDeKoning
    • 2 years ago
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    Why do you use 1/4?

  9. gohangoku58
    • 2 years ago
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    coz i need 2 in 2sin a cos a twice so i multiply and divide by 4

  10. RonnyDeKoning
    • 2 years ago
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    How do oyu get to sin 15? and sin 75?

  11. gohangoku58
    • 2 years ago
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    sin 52.5 = sin(90-37.5) = cos 37.5 sin 82.5 = sin(90-87.5) = cos 7.5 2 sin 7.5 cos 7.5 = sin 15 same for sin 75

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