Whats the difference?
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2016 Preliminary
Maths Extension • English Advanced • Biology • Legal Studies • Physics • PDHPE
2017 HSC
Maths Extension 2 • English Advanced • Biology • Physics • PDHPE
Atar aim: 97
Desired Course: Physiotherapy
How do we get this equation
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It's most instructive for you to prove these yourself so I will just provide some hints.
Consider the forms of sin(X+Y), sin(X-Y), cos(X+Y), cos(X-Y) upon expansion. Is it possible to combine these to obtain products of the form sin(X)cos(Y), sin(X)sin(Y), cos(X)cos(Y) ?
Now choose X and Y appropriately to put these equations in a "sums to products" form.
Currently studying:
PhD (Pure Mathematics) at ANU
2014 HSC - E4 in MX1 (90) / 2015 Gap Year (Youthworks) / 2016-2017 UOW - B. Maths Adv. (done math110, 201, 202, 203, 204)
Links:
View English Notes (no download)
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