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Math

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Two Planes leave an airport at the same time, one flying 300km/h and the other at 420km/h
The angle between their flight paths is 75 degrees after three hours, how fart apart are they?

  • Math -

    I don't see your answer to check.

    The law of cosines would work well on this problem. You know two sides (900 and 1260 km) and the included angle (75 deg) of a triangle.

  • Math -

    so it would be c^2=a^2+b^2-2ab cos C
    900^2+1260^2-2(900)(1260)(cos75)
    c^2=33542.9
    c=183.14km
    is it right?

  • Math -

    thanks

  • Math -

    No. It isn't right. See my answer to your later post.

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