Question

Find the value of `cos ((29 π)/3)`.

Options

• 1

• 0

• `sqrt(3)/2`

• `1/2`

Answer 1

`bb(1/2)`

Explanation:

`cos ((29 π)/3) = cos[((27 + 2)π)/3]`

= `cos(9π + (2π)/3)`

= `- cos  (2π)/3`

= `- cos (π/2 + π/6)`

= `sin  π/6`

= `1/2`