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How to find answer of y = 0 using double angle formulas  TOPIC_SOLVED

This equation cos2theta = 1, the closest equation using cos2theta double angle formula is the cos^2x - sin^2x version. But it is not exact. Can anyone show me the steps on how to complete the equation? The answer of 0 = 2y^2 is the nearest to y = 0 that I can solve without completing using dividing ...
by Aaahhhh Fuuu.....
on Sun Apr 17, 2011 1:39 pm
 
Forum: Trigonometry
Topic: How to find answer of y = 0 using double angle formulas
Replies: 6
Views: 2158

Re: How to find answer of y = 0 using double angle formulas  TOPIC_SOLVED

"Throw yo' hands up!?"
Attach yourself to this aspect of the equation if I did not mention it: The problem is asking to convert from polar to rectangular. Looking over my question I see I did not mention this part.
by Aaahhhh Fuuu.....
on Sun Apr 17, 2011 10:33 pm
 
Forum: Trigonometry
Topic: How to find answer of y = 0 using double angle formulas
Replies: 6
Views: 2158

Re: How to find answer of y = 0 using double angle formulas  TOPIC_SOLVED

The only thing I need some instruction for this problem of cos2theta = 1 using polar to rectangular form. The result shown in the book is y = 0 but without any methods just the answer is useless. Thank you for your sympathies :thumb:
by Aaahhhh Fuuu.....
on Tue Apr 19, 2011 2:33 am
 
Forum: Trigonometry
Topic: How to find answer of y = 0 using double angle formulas
Replies: 6
Views: 2158

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