Asked by jimmy
Which expression is equivalent to tan(-x)cos^2x?
-sin xcos x
sin xcos x
tan x + sin2x
tan x − sin2x
-tan x − sin2x
-sin xcos x
sin xcos x
tan x + sin2x
tan x − sin2x
-tan x − sin2x
Answers
Answered by
bobpursley
tan(-x)=sin(-x)/cosx
then tan(-x)cos^2x=sin(-x)cosx=-sinxcosx
then tan(-x)cos^2x=sin(-x)cosx=-sinxcosx
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