I have a question about my trig homework?
Ok, so the question to my homework asks for the exact value of the expression WITHOUT using a calculator. Keep in mind this question has to do with inverse trig functions.
Expression: (sin^-1) (sin 3 pi/2)
(sin^-1) (sin 3 pi/2)
*I glanced at my unit circle*
However when I typed in "-1" in my online homework, it was considered wrong. So it gave me another try and I put 3 pi/2 as my answer. That was also incorrect and the homework told me that the correct answer is -pi/2
This is my face after seeing the right answer:
Please explain how -pi/2 is correct and show your work
- PopeLv 77 years agoFavorite Answer
sin(3π/2) = sin(-π/2) = -1
But 3π/2 is not on the range of sin⁻¹(x), while -π/2 is.