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Bailey D.

asked • 05/31/16

what is the best option to verify sec(y)cos(y)=1

options
 
a. cot u =sin (u)/cos(u)
b. sec(-u)=sec(u)
c. 1+tan^2(u)=sec^2(u)
d.cos (u)=1/sec(u)
 

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