ow do you find the exact value of arccos(sin(pi/3))

iarc6io

iarc6io

Answered question

2022-07-19

How do you find the exact value of arccos ( sin ( π 3 ) )?

Answer & Explanation

eishale2n

eishale2n

Beginner2022-07-20Added 15 answers

knowing that sin ( π 3 ) = 3 2
arccos ( sin ( π 3 ) ) = arccos ( 3 2 )
we know that cos ( π 6 ) = 3 2
so, π 6 = arccos ( 3 2 )
arccos ( sin ( π 3 ) ) = arccos ( 3 2 ) = π 6
valtricotinevh

valtricotinevh

Beginner2022-07-21Added 3 answers

By definition, cos ( 1 2 π θ ) = sin θ f o r a l l θ
arccos ( sin ( 1 3 π ) ) = arccos ( cos ( 1 2 π 1 3 π ) ) = arccos ( cos ( 1 6 π ) )
= 1 6 π

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