Question #e88ad
1 Answer
Dec 13, 2017
Explanation:
#"using the "color(blue)"trigonometric identity"#
#•color(white)(x)tanx=sinx/cosx#
#"consider the left side"#
#(sinx+sinx/cosx)/(cosx+1)#
#=((sinxcosx+sinx)/cosx)/(cosx+1)#
#=(sinxcancel((cosx+1)))/(cosxcancel((cosx+1)))#
#=sinx/cosx=tanx=" right side"#