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OpenStudy (anonymous):
Find the trigonometric expression that is equal to sin(w) / sec(w+1) + sin(w) / sec(w-1)
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OpenStudy (anonymous):
use cos(A+B) to expand sec(w+1) and cos(A-B) to expand sec(w-1) to knowing that sec=1/cos
OpenStudy (anonymous):
Thanks!
OpenStudy (anonymous):
Anytime!
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