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November 01, 2025, 10:10:28 am
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Author Topic: Trigonmetry help  (Read 789 times)  Share 

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khalil

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Trigonmetry help
« on: September 13, 2009, 03:32:05 pm »
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Can someone help me with Q ii) which is attached to this post. Don't have to draw the diagrams, just explain why two cases are so.
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Ilovemathsmeth

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Re: Trigonmetry help
« Reply #1 on: September 14, 2009, 01:22:45 pm »
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This is because of the ambiguous case of the sine rule.

As you know, sin (120 degrees) = sin (60 degrees). When you draw a triangle, you never necessarily know whether the angle is obtuse/acute unless specified by the question. Thus make allowances for two possible angles.
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khalil

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Re: Trigonmetry help
« Reply #2 on: September 14, 2009, 10:36:42 pm »
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Thanks bro
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