Question

cos 255°+ sin 165°=?
answer this!!! ​

Answer 1

$<marquee bgcolor = aqua > <fontcolor="red"> <h1>Given expression</ ht> </marquee>$

=cos(270 −15)+sin(180−15)−sin15+sin15 =0

hope it helps you

Answer 2

Sin 15 + sin 15 = 0

Step-by-step explanation:

cos 255 = cos ( 270 - 15 ) = - sin 15

sin 165 = sin ( 180 - 15 ) = sin 15

so,

cos 255 + sin 165

= sin 15 + sin 15

= 0