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Integrating (e^x)sin(x)

First and foremost, this is an integration of two functions multiplied together and so the first thing that should come to your head is integration by parts from C4. However, when we usually do integration b...
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Answered by Arif U. • Maths tutor
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Trigonometry: Find the length of side x on the right-angled triangle.

To answer this question it is best to remember SOH CAH TOA.SOH: sin(angle)=opposite (length of side opposite the angle)/hypotenuse (length).CAH: cos(angle)=adjacent (length of side next to the angle)/hypoten...
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Answered by Molly K. • Maths tutor
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What can you see in the photo? What themes are covered?

Example photo: smokingIci, on voit quelqu'un qui fume une cigarette et boit un cafe. Il y a une serveuse qui apporte des boissons sur un plateau. Je pense que le bar est dehors et c'est la nuit. La personne ...
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Answered by Eve C. • French tutor
2433 Views

Describe a simple way to distinguish between aqueous solutions of potassium nitrate (KNO3) and potassium sulfate (K2SO4) using one test tube reaction

Add one of the following: barium chloride, barium hydroxide, barium nitrateObservation with potassium nitrate: colourless solution/ or no visible change or reaction) Observation with potassium sulfate: white...
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Answered by Rebecca S. • Chemistry tutor
10703 Views

How do you use the 'pluscuamperfecto' and how is it formed?

The ' pluscuamperfecto ' is equivalent to the pluperfect in English, here's an example:Ya había comido la cena cuando Juán me llamó. I had already eaten dinner when Juan rang me.So we can see that the pluscu...
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Answered by Thomas C. • Spanish tutor
2580 Views