Question

find the exact value, without using a calc.

sin^-1(sin(5pi/7))

Answer 1

where is 5p/7 on the unit circle?

Answer 2

how do i tell where 5pi/7 is?

Answer 3

hint : sin^-1(sin x) = x

Answer 4

yes okay, but sin^-1 has restrictions

Answer 5

i want to know how to locate 5pi/7 on the unit circle

Answer 6

It's 5/7'ths of a pi. So just under 180 degrees (somewhere in QII)

Answer 7

i dont think thats right

Answer 8

lol

Answer 9

I'm sorry that you don't think that :\

Answer 10

5pi/7=128.57 degrees

Answer 11

Oh i see what you're saying Collat, since the arcsin is restricted to Q1 and Q4, hmm

Answer 12

So there, you have your approximate answer, and your EXACT answer is.... 5pi / 7

Answer 13

where exactly is 128.57 degrees located on a unit circle