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Derive Law of Cosines using Pythagorean Theorem

Consider the triangle ABC. Denote h the altitude through B and D the point where h intersects the (extended) base AC Cosine function for triangle ADB. cos α= x/c => x=c*cos α Pythagorean theorem for trian...
JM
Answered by Jan M. • Maths tutor
3830 Views

Compare how the authors of two texts you have studied present barriers to love.

There is never a set answer for english literature. Depending on the aspects of Literature and the texts the student feels most comfortable and most competent working with, we might discuss rhythm, rhyme, to...
KM
8586 Views

Explain how hydrogen bonding occurs between molecules of water.

Hydrogen Bonding occurs between 2 adjacent molecules of H 2 O. The polar covalent bond between oxygen and hydrogen creates negative and positive partial charges respectively. There is a weak intermolecular f...
TH
Answered by Tom H. • Biology tutor
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Steel has a density of 8030kg/m^3. Show that a steel ball with a diameter of 5cm weighs approximately 5N

Using Weight = mass*gravitational strength Using: Mass = density * volume Using Volume = (4/3) pi r 3 Radius = 2.5cm = 0.025m Volume = (4/3) pi 0.025 3 = 0.00006544 m 3 (to 4 siginificant figures) Mass = 803...
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Answered by Sameh H. • Physics tutor
13509 Views

Generate an array of integers from 0 to 99 and split it into two smaller arrays. Each smaller array will contain half of the original.

Import numpy originalArray = numpy.range(100) split1 = originalArray[:len(originalArray)/2] #The use of a :X as an index into an array means that you want all values from the start to the Xth value split2 = ...
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Answered by Sameh H. • Python tutor
5618 Views