The 2 acute angles of a right triangle each have?

1 answer:

4 0

Well if you have to add up to 180 degrees and you already have 90 degrees covered because of the right triangle then it should be 45 and 45

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Evaluate the double intergal between the two cirlces

svp [43]

3down votefavoriteFind the area between the circles x2+y2=4x2+y2=4 and x2+y2=6xx2+y2=6x using polar coordinates.I have found that the equation of the first circle, call it C1C1, is r=2r=2 on the other hand, for C2C2, I get that its equation is r=6cosθr=6cosθ. Then, to find the bounds of integration, I have found that their angle of intersection should be θ=arccos(1/3)θ=arccos⁡(1/3) and θ=−arccos(1/3)θ=−arccos⁡(1/3). Then, to set up the double integral:A=∫arccos(1/3)−arccos(1/3)∫26cosθrdrdθA=∫−arccos⁡(1/3)arccos⁡(1/3)∫6cos⁡θ2rdrdθHowever, when evaluating this integral with the calculator, I get a negative value. What would be the problem in this case? Thanks in advance for your help.

5 0

4 years ago

You drive for 30 min at 100 km/h and then stop for 15 min. you then drive for 45 min and 80 km/h. you average speed for the enti

Rasek [7]

So basically you drove 1/2 hour at 100 km/h which works out to a total travel distance of 50 km (you multiply a 1/2 by 100)

Then you drove for 3/4 hour at 80 Km/h which works out to a total travel distance of 60 km (multiply 3/4 by 80)

now you know that you traveled a total of 110 km

now add up all the times 30 + 15 + 45 = 90 minutes or 1.5 hours

now you know that you traveled a total of 110 km in 1.5 hours

so your average speed is 73.33 km/h for the entire trip

4 0

3 years ago

Will mark brainliest if you help me pleaseeee

Luda [366]

$a(n) = {n}^{2} + 3$