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OpenStudy (anonymous):
tan(-15)
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OpenStudy (anonymous):
do you have a calculator because if you do theres a button that says tan and you put in -15 sorry i can tjust give you the answer or ill get in trouble
OpenStudy (anonymous):
i have write the steps using tanx-tany/1+tanxtany
OpenStudy (anonymous):
oh im sorry i really dont know
OpenStudy (isaiah.feynman):
@aldyeah use that identity you showed it works.
OpenStudy (isaiah.feynman):
|dw:1387595551059:dw|
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