Recent content by tennistudof09

I wanted to make sure I did this problem correctly. The problem is: A particle moves along a straight line and its position at time t is given by s(t)=2t^3 - 21t^2 + 60t where s is measured in feet and t in seconds. Find the velocity of the particle when t=0. I took the derivative of...

the problem says: find and state the component form of the following vectors. c= 3i + 4j P(0,0),Q(5,-2) for some reason, i think i ended up doing unneccessary work. I found the Work of the problem instead, which is 7. Is work the same thing as component form? If not, what am I supposed to...

i am trying to verify the two identities listed below: cot(-x)cos(-x)+sin(-x)= -csc x i started out as: cos(-x)/sin(-x) cos(x)-sin x, then got it to cos^2 x/sin x - sin x. I thinking i am solving this correctly but I can't figure out the next step to get -csc x. sin^4 x + (2 sin^2...

Find all solutions of the equation 3sin^2x-7sinx+2=0 in the interval [0,2pi). I factored it out first and got (3sinx-1)(sinx+2)=0 and then solved, and got sinx=1/3 and sinx=-2 if I did it correctly. What i am having trouble with is finding where sin(x)=1/3 and -2.

so therefore i would convert 12 minutes into hours, which allows me to get .2 hours. Then since velocity is distance/time, i'd get 21km/.2 hr, and would give me a solution of 105 km/hr. Did I do that correctly?

Am i on the right track? We have this problem for math class: For an interval of 45 minutes, the tsunamis near Hawaii caused by the chilean earthquake of 1960 could be modeled by the equation y= 8 sin (pi/6)t, where y is in feet and t is in minutes. a) find the amplitude and period of the...

We have this problem for math class: For an interval of 45 minutes, the tsunamis near Hawaii caused by the chilean earthquake of 1960 could be modeled by the equation y= 8 sin (pi/6)t, where y is in feet and t is in minutes. a) find the amplitude and period of the waves b) If the...