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Author Topic: Need help on 2 math problems (Trig)  (Read 2913 times)

Offline putin

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Need help on 2 math problems (Trig)
« on: May 08, 2011, 11:45:34 AM »
1st problem:

Find the exact value of cos75

2nd problem:

Evaluate cos220cos40+sin220sin40
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Offline Old Disabled Account

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Re: Need help on 2 math problems (Trig)
« Reply #1 on: May 08, 2011, 04:11:55 PM »
1. 0.92175127
2. -0.598460069
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