October 2018 1 249 Report
Bentuk (sec α-tan α)² setara dengan bentuk....
a. (1+ sin α)/ 1- sin α
b. (1-sin α)/ 1+ sin α
c. (1-cos α)/1 +cos α
d. (1+cos α)/1- cos α
e. (cos α- 1)/cos α- 1

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