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November 01, 2025, 03:17:52 pm
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Author Topic: Challenge - Trig Question  (Read 810 times)  Share 

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BubbleWrapMan

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Challenge - Trig Question
« on: May 17, 2011, 10:08:38 pm »
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Simplify:



Just something I dreamt up.
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Tim Koussas -- Co-author of ExamPro Mathematical Methods and Specialist Mathematics Study Guides, editor for the Further Mathematics Study Guide.

Current PhD student at La Trobe University.

yawho

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Re: Challenge - Trig Question
« Reply #1 on: May 17, 2011, 10:24:53 pm »
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=(cos108cos72-sin108sin72)^2
=(cos(108+72))^2
=(cos180)^2
=1
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BubbleWrapMan

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Re: Challenge - Trig Question
« Reply #2 on: May 17, 2011, 10:39:58 pm »
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Good work, basically no one at my school can do it. D=
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Tim Koussas -- Co-author of ExamPro Mathematical Methods and Specialist Mathematics Study Guides, editor for the Further Mathematics Study Guide.

Current PhD student at La Trobe University.

soopertaco

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Re: Challenge - Trig Question
« Reply #3 on: May 29, 2011, 11:39:32 am »
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haha climb too high you amaze me :')
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