rooney72: If cos x = 0.8 find the value of 16 tan x
cos(x)=0.8
then x equals:
x=acos(0.8)
[input]16*tan( acos(0.8) )[/input]
--------------------------------------
or:
given this formula (any math formulary):
tan( x ) = sqrt( 1 - cos(x)^2 ) / cos( x )
16*tan( x ) = 16*sqrt( 1 - 0.8^2 ) / 0.8
16*sqrt( 1 - 0.8^2 ) / 0.8
16*sqrt( 1 - 0.64 ) / 0.8
16*sqrt( 0.36 ) / 0.8
16*sqrt( 0.36 ) / 0.8
16*0.6 / 0.8
9.6 / 0.8
12 [input]16*sqrt( 1 - 0.8^2 ) / 0.8[/input]
+4 
+3146 
