Question

Given angle x,where 0 <= x <= 360 (degrees) solve for to the nearest degree.
a)cos(2x) = 0.6420
b)sin(x + 20) = 0.2045
c)tan(90 - 2x) = 1.6443

Answer 1

just use your calculator to find the angle with the given property. Then solve for x.

For example, tan 58.7° = 1.6443
Since the period of tan(x) is 180°, you have to find x where

90-2x = 58.7: 2x = 31.3, so x = 16
2x = 211, so x = 106
also, continuing on, x = 196,286

Do the others in like wise.

Answer 2

How did you get 2x=211 ?

Answer 3

search up nelson function 11 solutions to see the full solution in pdf