S S SpiralFlex Aug 16, 2011 It's 300 now! Yay! You must be my 10000th message. I will give you a prize. By the way, you said you were going to PM me about something?
It's 300 now! Yay! You must be my 10000th message. I will give you a prize. By the way, you said you were going to PM me about something?
S S SpiralFlex Aug 16, 2011 Did the question you asked me yesterday pop up? Nothing special, as usual.
S S SpiralFlex Aug 16, 2011 For when you wake up. http://www.oceanmistgh.com/unjimages/imagesbreakfastoceanmist/breakfastoceanmist.jpg
For when you wake up. http://www.oceanmistgh.com/unjimages/imagesbreakfastoceanmist/breakfastoceanmist.jpg
S S SpiralFlex Aug 15, 2011 Also, if you cannot remember the exact values, remember this diagram. http://www.mediafire.com/?eggx61p6a8vlu7r
Also, if you cannot remember the exact values, remember this diagram. http://www.mediafire.com/?eggx61p6a8vlu7r
S S SpiralFlex Aug 15, 2011 From my diagram, we went through the unit circle one whole revolution of 360 degrees. http://www.mediafire.com/?z5i16lx86676zyg Now we still have a bit to go. 150 degrees left. We can draw this like so. http://www.mediafire.com/?x0zo85lu33x3r4x Now. We can see it lies on the second quadrant. Is cosine in the second quadrant positive or negative? It is negative. Keep this in mind. How far is it from the horizontal plane? 30 degrees. Hence cos 510 = -cos 30. From our special values - cos 30 = sqrt (3)/2
From my diagram, we went through the unit circle one whole revolution of 360 degrees. http://www.mediafire.com/?z5i16lx86676zyg Now we still have a bit to go. 150 degrees left. We can draw this like so. http://www.mediafire.com/?x0zo85lu33x3r4x Now. We can see it lies on the second quadrant. Is cosine in the second quadrant positive or negative? It is negative. Keep this in mind. How far is it from the horizontal plane? 30 degrees. Hence cos 510 = -cos 30. From our special values - cos 30 = sqrt (3)/2