Thursday
May 5, 2016

# Posts by df

Total # Posts: 23

precalculus
z1=[cos pi/4 +sin pi/4] z2= [cos 2pi+sin 2pi] z1= sqrt 5 solve. how do you do this? substitute z1 and do what?
March 17, 2015

Chemistry
an unknown salt is either NaCN,NaC2H3O2, NaF, NaCl, or NaOCl. when 0.100 molar of the salt is dissolved in 1.00 L of solution, the ph of the solution is 8.07. what is the identity of the salt? where do I start? How do I solve it, cuz im not gettign right answer.
March 17, 2015

precal
thanks
March 17, 2015

precal
identify all solutions in the interval [0,2pi]: cos (2x) csc^2x=2cos(2x) I have no clue how to solve.
March 17, 2015

stats
October 9, 2012

math
A triangle has sides of lengths 9 cm, 40 cm, and 41 cm. Which statement is true about this triangle? Not a right triangle?
February 28, 2011

PRECALCULAS
sin ¥è = 1/2 ¥è=90 or pi/2 only positive on pi/2 ¥è=pi/2+2kpi
February 13, 2011

chemistry 1A
R(CO2H)2+2NaOH-->R(CO2Na)2+2H2O Mu(NaOH)=44,81*10^(-3)*0,0953=4,27*10^… mol Mu(acid)=4,27*10^(-3):2=0,002135 mol If R=aliphatic saturated rest and there are not other substituents in C-chain,then R=CxH2x and: 0,2178=0,002135(90+12x+2)=0,1964+0,025… x=(0,2178-0,...
November 2, 2010

Chemistry
deez nuts
September 21, 2010

Physics
(a) Assuming that only gravity is acting on it, how far does an electron have to be from a proton so that its acceleration is the same as that of a freely falling object at the earth's surface? (b) Suppose the earth were made only of protons but had the same size and mass ...
July 29, 2010

fd
if y=36 when x=9 find x when y=52
June 17, 2008

Muscular Energy
it's a part of your body that helps you move.
February 18, 2007

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