Question

(a) sin x if x = (1/4)degree

Round all answers to three decimal places

I got 12.053, 0.210, 4.363.. None of those seem to be right. What am I doing wrong? am i just punching the numbers in my calculator incorrectly?

Answer 1

my keystrokes on my calculator:
2nd
sin
.25
=

to get 14.478°
but the sine is positive in I and II
so x could also be 180 - 14.478 = 165.522°

there are an infinite number of solutions, just add/subtract 360° to any existing answer to produce more.

Answer 2

who said anything about sin^-1 ?

Answer 3

for keeping an eye on me.
I just have to read more carefully, I read it as

sinx = 1/4