The correct answer is 17 what i did was plug in 17 where ever you see x so x2 would be 17x2 an then plus the 5 gives u 39 3x 17x3=51 51+10=61 now add the totals 61 plus 39 gives u 100
Csc x · sec x - tan x = = 1 / sin x · 1 / cos x - sin x / cos x = = 1 / sinx cos x - sin² x / sin x cos x = = ( 1 - sin² x ) / (sin x cos x) = = cos² x / ( sin x cos x ) = = cos x / sin x = cot x
