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Find the solutions of the equation 3cos(2 theta) - 5cos(theta) + 2 = 0 in the interval 0 < theta < 2pi.

3cos^2(theta) - 3sin^2(theta) - 5cos(theta) + 2 = 0 3cos^2(theta) + 3cos^2(theta) - 3 - 5cos(theta) + 2 = 0 6cos^2(theta) - 5cos(theta) - 1 = 0 delta = 25 + 24 = 49 cos(theta) = (5 - 7)/12 = -1/6 or cos(thet...
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Answered by Piotr W. • Maths tutor
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Explain how a competitive inhibitor stops an enzyme from working.

Enzymes are proteins that act as biological catalysts: they increase the rate of reactions without being used up themselves. A region on the enzyme, known as the active site, is very specific and complementa...
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Answered by Jabed M. • Biology tutor
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How does Le Chatelier's principle work when the pressure is changed?

First of all, it is important to note that changing the pressure will only affect the gas molecules in the reaction. Taking a simple equilibrium equation such as: 2SO 2 (g) + O 2 (g) &lt;===&gt; 2SO 3 (g) Fr...
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Outline and evaluate research into the effects of leading questions on the accuracy of eyewitness testimony

A01: Loftus and Palmer (1974). Investigated how misleading information can alter memory post event. They asked participants to estimate the speed of two cars, changing cues provided in the question. Particip...
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Answered by Sianna B. • Psychology tutor
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Describe and explain the role of animal studies in attachment, provide an example

A01: Harlow’s Rhesus monkeys (1958). Harlow reared infant monkeys in isolation away from their mothers, causing privation, and put them in cages with two surrogate mothers. One was wire and a bottle of milk,...
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Answered by Sianna B. • Psychology tutor
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