Consider this article. There is a 45-45-90 triangle
Special right triangles - Wikipedia, the free encyclopedia
Therefore using the cosine ratio
For
Consider this article
http://www.haverford.edu/physics/Mat...Trig_Ident.pdf
then
Can someone please help me out with this question.
Find all the possible angles for A if 0 ≤ A ≤ 2 (pi)
I) cosA = -1/(square root of 2)
How do I solve this? I'm really bad at this stuff and need to know because I have a test soon... I want to leanr how to do it but please explain how step by step.
Thanks
Consider this article. There is a 45-45-90 triangle
Special right triangles - Wikipedia, the free encyclopedia
Therefore using the cosine ratio
For
Consider this article
http://www.haverford.edu/physics/Mat...Trig_Ident.pdf
then
okay i have a totally unrelated question... I looked in my lesson and ifgured some stuff out but have trouble at one part...
I know how to solve this question now... but when I draw the unit circle and draw the special triangle/angle or whatever you call it...
How do i know what numbers are on the adjacent side, and opposite side.
For the question: Cot A = -1/ square root of 3
cot theta = x/y = -1/square root of 3
then you find what x and y is to get the triangle.
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but for my question it's cos, so it's adj/hyp... so how do i figure out what numbers go at the adjacent, opposite and hyp when i draw the unit circle?
I hope this makes some sense, I sort of understand it but get confused at this part.
yes I know what they are but I'm trying to figure out what numbers should go for each side...
For the question Cos A = -1 / square root of 2
when I draw the unit circle and draw the special angle... what numbers would go at the adjacent, opposite and hyp side?
Thanks for the help : )
Special right triangles - Wikipedia, the free encyclopedia
This article shows the sides of the triangle. The triangle fits onto the unit circle.
thanks... I finally figured it out... wow I don't know how I didn't see that before... for some reason I thought it was always different the numbers for the 3 sides... I wasn't even thinking about the cases and how it's the same.
Thanks again for all the help
Hey i actually have one more question...
When we look for the ratios for csc, sec and cot... say the angle is in Quadrant 2... does that mean that Sine is the only one that's positive and the otehr 2 will be negative?
Becasue my teacher has an example and it might be wrong because it has only 1 of them being negative and the other 2 positive which is impossible right?