32 Answered Questions for the topic Precal

Precal

12/06/15

Find sin(a+b) if tan(a)= 7/24 where a is in the 3rd quadrant and cos(b)= -12/13 where b is in the 2nd quadrant
I could really use some assistance on this problem! I'm a little confused on how to work it.
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Expert Answers •1
Precal

09/04/15

If y varies inversely as the square of x, and y=1/8 when x=1, find y when x=5.
I'm not sure the answer to  this question.
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Precal

08/31/15

how many gallons of a 90% antifreeze solution must be mixed with 100 gallons of 25% antifreeze to get a mixture of 80% antifreeze?
please help just need an answer
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Expert Answers •1

09/29/14

find the slope and y-intercept for 4x-2y=8
Having trouble finding the slope perpendicular to the problem above as well, Please help and thank you so much 
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Expert Answers •2

08/07/14

Precal problems featuring triangles
The distance from the tee to the green of a particular golf hole is 290 yd. A golfer hits his drive and paces its distance off at 220 yd. From the point where the ball lies, he measures an angle of... more
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Precal

03/12/14

Direction and force of piano.
Two people are pushing a piano. One person pushes it with 175 pounds at an angle of 60 degrees To the x axis while the other pushes it with 250 pound at an angle of 30 degrees To the x axis. In... more
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Precal

04/28/13

given that f(x) = sin(x), show that f(x+h)-f(x)/h = sinx(cos(h)-1/h) + cos(x)(sin(h)/h)
given that f(x) = sin(x), show that f(x+h)-f(x)/h = sinx(cos(h)-1/h) + cos(x)(sin(h)/h) precal question  
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Expert Answers •2

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