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Mathematics 12 Online
OpenStudy (anonymous):

how to expand sin4x

OpenStudy (freethinker):

try

myininaya (myininaya):

Well the first thing you should notice is 4 is even so you can write 4x as 2(something) this should make you think of what identity?

OpenStudy (freethinker):

if you're not going to try, at least tell us what you don't understand

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