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Calc/Trig Help

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Calc/Trig Help
Russt
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#7
2010-10-02, 07:43 PM
Wait, what? No you can't. You can use difference of squares, though.

cos^4 - sin^4 = (cos^2)^2 - (sin^2)^2 = (cos^2 + sin^2)(cos^2 - sin^2) = 1(cos^2 - sin^2) = cos 2x.

arccos cos 2x = 2x.
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Messages In This Thread
Calc/Trig Help - by Corn - 2010-10-02, 06:42 PM
Calc/Trig Help - by 2147483647 - 2010-10-02, 06:50 PM
Calc/Trig Help - by Kaasoljoyyx - 2010-10-02, 06:55 PM
Calc/Trig Help - by Corn - 2010-10-02, 06:57 PM
Calc/Trig Help - by Hazzy - 2010-10-02, 07:00 PM
Calc/Trig Help - by Corn - 2010-10-02, 07:30 PM
Calc/Trig Help - by Russt - 2010-10-02, 07:43 PM
Calc/Trig Help - by Corn - 2010-10-02, 07:46 PM
Calc/Trig Help - by OB3LISK - 2010-10-02, 08:32 PM
Calc/Trig Help - by shouri - 2010-10-02, 08:37 PM
Calc/Trig Help - by 2147483647 - 2010-10-02, 09:50 PM
Calc/Trig Help - by Corn - 2010-10-02, 10:43 PM
Calc/Trig Help - by OB3LISK - 2010-10-02, 10:54 PM
Calc/Trig Help - by Corn - 2010-10-02, 10:54 PM
Calc/Trig Help - by Russt - 2010-10-02, 10:57 PM
Calc/Trig Help - by Corn - 2010-10-02, 11:34 PM
Calc/Trig Help - by Corn - 2010-10-21, 10:45 PM
Calc/Trig Help - by Stereo - 2010-10-21, 11:19 PM

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