How do you find the exact value of arcsin(sin(7π3))?

1 Answer
Jul 23, 2015

arcsin(sin(7π3))=π3

Explanation:

As an argument to a trigonometric function:
XXXX7π3 is equivalent to π3
XXXXXXXX(since 7π3=2π+π3)

Provided θ is within [0,π]
XXXXarcsin(sin(θ))=θ
XXXXXXXX(basic definition)

So
arcsin(sin(7π3))
XXXX=arcsin(sin(π3))
XXXX=π3