10. and are acute angles in quadrant I, with sin =7/25 and cos=5/13. Without using a calculator determine the values of sin( + ) and tan( + ). So far i did x^2 + y^2 = r^2 x^2 + 7^2 = 25^2 x^2= 625-49 x= +- 24 im not sure if thats even right...
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Originally Posted by Skoz 10. and are acute angles in quadrant I, with sin =7/25 and cos=5/13. Without using a calculator determine the values of sin( + ) and tan( + ). So far i did x^2 + y^2 = r^2 x^2 + 7^2 = 25^2 x^2= 625-49 x= +- 24 im not sure if thats even right... looks ok so far 24 is the adj side angle looks like you need to use the sum formulas and
Last edited by bigwave; December 1st 2009 at 04:34 PM.
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