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How do you find the length of a side of a right-angled triangle given the angle and the hypotenuse?

First label the triangle to show the opposite, adjacent and hypotenuse. Then you can use SOHCAHTOA to determine which trig function is needed. If you need to work out the opposite you use the sin function an...
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Answered by Lucy S. • Maths tutor
3522 Views

When do I have to use the subjuntive?

The subjuntive is used to express desire, doubt, emotions, probability and the unknown. It is usually used after these common expressions:Quizás (doubt), puede que (posibility), me gustaría que (desire), oja...
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Answered by Yicai M. • Spanish tutor
2079 Views

ForA=2x^2 –18x+80 (i) find dA/dx , (ii) find the value of x for which A is a minimum

dA/dx = 4x -18 : multiply the number before the x (coefficient) by the power and minus 1 from the power.4x = 18 so x = 4.5 to find the minimum or maximum point, make the differential equal to 0 and solve for...
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Answered by Dan A. • Maths tutor
6685 Views

Why is the oxygen saturation curve of haemoglobin sigmoidal?

The saturation curve of haemoglobin shows positive cooperativity. Initially, the porphyrin ring of the haem prosthetic group in haemoglobin is dome-shaped. When one molecule of oxygen binds one of the four s...
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Answered by Yunzila M. • Biology tutor
3510 Views

What is the benefit of myelination of an axon?

Myelination of an axon makes propagation of action potentials along it much faster. In unmyelinated axons, the action potential is constantly regenerated by active propagation, with the depolarisation causin...
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Answered by Yunzila M. • Biology tutor
3701 Views