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OpenStudy (anonymous):
lim [sin(a+x)sin(a+2x) - sin^2a] / x ? x->0 evaluate this limit without using l'hospital.
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OpenStudy (zarkon):
you could prob use the addition formula for sine to help get an answer
OpenStudy (anonymous):
ı did but ı couldnt find anything
OpenStudy (anonymous):
use substitution
OpenStudy (zarkon):
write it as a derivative
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