zegroes

ok you know thats fine too......

no reason to cuss

hmmm even if this was a real question theres not enough information in this problem to solve it.....so yeah poor shaun

Understanding the unit circles and reference angles steps below

•  First you Find the exact trigonometric function values for angles that measure 30°, 45°, and 60° using the unit circle.
•  Then you Find the exact trigonometric function values of any angle whose reference angle measures 30°, 45°, or 60°.
•  Lastly Determine the quadrants where sine, cosine, and tangent are positive and negative.

yes i have a vision you want me to tell you what two plus two is PHYCIC!!

ps dont know if i spelled that right lol

inverse operation is the operation that reverses the effect of another operation like for example addition can be countered with subtraction and vice versa.

sin(2u) = 2sin(u)cos(u)

sin(2sin^-1(x)) = 2sin(sin^-1(x))cos(sin^-1(x)) = 2xcos(sin^-1(x))

let y = sin^-1 x
x =siny

sin^2(y) = 1- cos^2(y)

cos^2(y) = 1 - sin^2(y)
cos^2(y) = 1 -x^2 >= 0 ( since anything^2 is always positive)

+/-cos(y) = sqrt(1-x^2)



sin(2sin^-1(x)) = 2sin(sin^-1(x))cos(sin^-1(x)) = 2xcos(sin^-1(x)) =+/- 2xsqrt(1-x^2)



Hopefully I didn't mess up somewhere.

The total bill for a dinner (excluding tax) is $50.00. If you leave an 18% tip, you will leave with less then you walked in with. I mean really why cant math be that simple it didnt ask for a specific number right????

.........you know reinout i.....need to save my brain power for questions on the forum ill come back later.....maybe