Tutors Answer Your Questions about Trigonometry-basics (FREE)
Question 110618: A wheel 4 ft. in diameter makes x revolutions. Find x, given that the distance traveled by a point on the circumference of the wheel is 23169 ft. Round your answer to the nearest whole number.
The answer is 1844 revolutions but I can't figure out how to get there.
Click here to see answer by bucky(2189)  |
Question 110530: Marc took 3 hours (h) to mow a lawn while Angelina took 150
minutes (min) to mow the same lawn a week earlier. Write the ratio of
Marc’s time to Angelina’s time as a ratio of whole numbers.
Help please I am not totally clear on how to figure this problem out.
Click here to see answer by ankor@dixie-net.com(15624)  |
Question 110711: Science and technology. Fungicides account for 1/10 of the pesticides used in the United States. Insecticides account for 1/4 of all the pesticides used in the United States. The ratio of fungicides to insecticides used in the United States can be written 1/10 divided by 1/4. Write this ratio in simplest form.
Click here to see answer by stanbon(57219) |
Question 111633: how do you verify the identity: cos^4 x-sin^4 x=cos(2x)
how do you find cos(sin^-1(-5/13)), sin(tan^-1(2/3))
how do you find cos^-1(-sin(2/3pi))
how do you find tan^-1(cos(3pi/2))
how do you find sin^-1(sin(-2pi/3))
I am having trouble with these anyone that can help me understand these problems please show me an easy way to solve these, we are not allowed to use the calculator. thank you so much
Click here to see answer by Edwin McCravy(8879)  |
Question 111648: Write the fraction as a percent.
1 1/5 (One and one/fifth)
can someone please help me with this? I have never been good with these kind of problems and obviously nothing has changed. I just do not understand how to do this.
Click here to see answer by BrittanyM(80) |
Question 111893: A tree casts a shadow that measures 5 m. At the same time, a meter stick casts a
shadow that is 0.4 m long. How tall is the tree?
Will someone please help me with this one? This is my last question. Hope everyone had a nice Thanksgiving!!
Click here to see answer by solver91311(16868)  |
Question 111924: Gasoline accounts for 85% of the motor fuel consumed in the
United States every day. If 8,882 thousand barrels (bbl) of motor fuel is consumed each day, how much gasoline is consumed each day in the United States? Round to nearest barrel?
Help me please?!?!
Click here to see answer by ankor@dixie-net.com(15624) |
Question 112229: I need help solving this question:
From a boat on the water, the angle of elevation to the top of a cliff is 31 degrees. Another point situated 300 meters closer to the cliff has an angle of elevation of 33 degrees. What is the height of the cliff?
I was trying to draw a diagram but I'm not sure if it was right, can you please show your work so I know what I'm doing wrong?
Click here to see answer by bucky(2189) |
Question 112355: Then angle x satisfies the equation 2tan^2x-5secx-10=0, where x is in the second quadrant. Find the exact value of sec x.
I know that the identity of 1+tan^2x=sec^2x may help me in this problem, but I am not sure what to do next. Thanks a lot!.
Click here to see answer by jim_thompson5910(28476) |
Question 112354: Solve the equation 3sin^2x = cos^2x, for 0 degrees is less then or equal to x which is less than or equal to 180 degrees
I really appreciate this!!!
I changed it to 3sin^2x-cos^2x=0
I just subracted the cos from both sides of the equation, but I do not know what to do from here.
Click here to see answer by jim_thompson5910(28476) |
Question 112398: sheila practiced 1 1/2 hours on monday, 3 3/4 hours on Tuesday, and 2 1/4 hours on Wed. What is the total number of hours that she practiced?
I got down to 30/4 = 7 2/4. But can I reduce it to 8 1/2 ?
Click here to see answer by bucky(2189) |
Question 112912: A company needs to create an open topped box to shipts its product. The box is going to be made by cutting congruent squares from each corner of a piece of cardboard, and then folding the carboard to create a container of maximum volume. What is the size of each square that is removed from the corners, what are the dimensions of the box, and what is the volume of the box with the largest area? The piece of cardboard has a length of 65 inches and a width of 56 inches.
Click here to see answer by ankor@dixie-net.com(15624) |
Question 113516: A store has t-shirts on sale at 2 for $5.50. At this rate, what do five T-shirts costs?
My solution is:
2 shirts/$5.50 = x/5 shirts
=> 4 shirts = $22
=> 1 shirt = $2.75
=> $22+$2.75 = $24.75
Is that the right formula to get that result?
Click here to see answer by solver91311(16868) |
Question 114079: Hello. I have a problem that I dont understand and I was wondering if anyone could help me. I problem is:
cosxcscx + cosxSQRT2 = 0
I got as far as: tanx + cosxSQRT2 = 0
Any help would be greatly appreciated!
Click here to see answer by stanbon(57219) |
Question 115224: -12-(-17)
_____________
-23-(-23)
This is a fraction, and this is my last question, hopefully someone will be able to help me with it. Please. Can you tell I do not understand any kind of fraction until someone actually explains it to me in terms I can understand, can someone please help me?
Click here to see answer by jayanthihemkos@yahoo.com(87) |
Question 115264: please help me understand these
in triangle ABC given that sides b=10,c=8, angle A=60degrees, find side a?
in triangle ABC given that sides a=4,b=8 and c=10, find cos B where B is the angle opposite to side b?
Click here to see answer by stanbon(57219) |
Question 115222: Find the five-number summary of the following set of numbers.
0.16, 0.08, 0.27, 0.20, 0.22, 0.32, 0.25, 0.18, 0.28, 0.27
HELP can someone please explain this five number thing to me? I do not understand this either. :(
Click here to see answer by stanbon(57219) |
Question 115269: find the rectangular form of 4(cos(5/6 pi)+ i sin(5/6 pi))?
find the trigonometric form of sqrt3 - i?
i think the answer for the second question is 2(sqrt3/2 - i/2)= 2 cos(pi/6)- sin(pi/6))
any help would be greatly appreciated
Click here to see answer by stanbon(57219) |
Question 115271: find each of the following 2(cos 225 degrees+ i sin 225 degrees)/4(cos 105 degrees + i sin 105 degrees)?
and find
2(cos 225 degrees + i sin 225 degrees) x 4(cos 105 degrees + i sin 105 degrees)
please help thanks
Click here to see answer by stanbon(57219) |
Question 115791: If you are given a right triangle with an acute angle ((((theta))), what two trigonometric functions of (((theta))) can you calculate using the lengths of the hypotenuse and the side opposite (((theta)))?
Click here to see answer by edjones(7569)  |
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