Question

The value of cos (3π/2)^c is​

Answer 1

Answer:

Correct option is

A

2

π

We have, cos

−1

(cos

2

3π

)

=cos

−1

cos(2π

2

π

) [∵cos(2π−

2

π

)]=cos

2

π

=cos

−1

cos(

2

π

)=

2

π

{∵cos

−1

(cosx)=x,x∈[0,π]}

Note remember that, cos

−1

(cos

2

3π

)



=

2

3π

∵

2

3π

∈(0,π)