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OpenStudy (anonymous):
verify the identity cot(x)= (1+cos2(x))/(sin2(x))
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OpenStudy (anonymous):
it's hard to get it. can you explain it a little more
OpenStudy (anonymous):
may you help me with another?
OpenStudy (lizz123):
sure
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OpenStudy (lizz123):
tag me
OpenStudy (lizz123):
What is the question
OpenStudy (anonymous):
sin4(t)=4sin(t)cos^3(t)-4sin^3(t)cos(t)
OpenStudy (anonymous):
@lizz123
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