PreCalculus - Trigonometry: Trig Identities (4 of 57) Simplify the Trig Expression: 2

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In this video I will simplify the expression [(1+sinx)/cosx]+[cosx/(1+sinx)]=?
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It goes good with a morning coffee. Brighten's up my day.

haimbenavraham
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At 1:18 why add in "twice the product" and not just sin-squared? I'f i may ask sir!

bhall
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Hello sir ? How can I Solve 800sin (x)cos (x)-800sin (x)+100cos (x)=0 in text book they say solving by trial and error I don't know how ??

ssemandadavid