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Posted by on Wednesday, May 23, 2012 at 12:17am.

If b= 9, c= 5 and <A=67° find side a.

  • math - , Wednesday, May 23, 2012 at 4:33am

    use the cosine law

    a^2=9^2 + 5^2 - 2(9)(5)cos 67°
    = ....

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