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Thinking of sine and cosine as ratios of side lengths in a right angled triangle, sin(x) = o/h and cos(x) = a/h, so the sin(x)^2 + cos(x)^2 becomes (o^2 + a^2)/h^2. By Pyhtagoras, o^2 + a^2 = h^2, so we g...
3A^2 B(A +4B + 3a^3 B^2)
0.375
Often, the compound angle formulae can seem quite offputting, especially since exam pressures can mean the random "R" at the front of an angle addition formulae appears confusing. However, findi...
The nth term falls into the topic of linear sequences. A linear sequence is a set of numbers (such as "1, 2, 3, 4, ...") that are connected by a ruleLBAnswered by Luke B. • Maths tutor191083 Views
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