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OpenStudy (anonymous):
1+tan^2(10deg)-csc^2(80deg) ?
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OpenStudy (jdoe0001):
http://ichthyosapiens.com/School/Math/Trig/ch05CofunctionIdentities.jpg <--- notice the identity at the bottom-right
OpenStudy (jdoe0001):
could we use that to rewrite say... \(\bf csc^2(80^o)\quad ?\)
OpenStudy (jdoe0001):
keep in mind that 90 - 10 = 80
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