Question #5e4dc

1 Answer

Mar 5, 2017

#cos x = -12/13#

Explanation:

Reminder:
#tan (x) = - tan (-x)# --> #tan x = 5/12#
#tan x = sin x/(cos x)# --> #cos x = sin x/(tan x)#
In this case -->
#cos x = sin x/(tan x) = (-5/13)(12/5) = - 12/13#

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Question #5e4dc

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