Question

Evaluate cos2π/3−arctan1

Answer 1

I need help on this maths

Answer 2

\[\cos \frac{ 2 \pi }{ 3 }-\arctan(1)\]

Answer 3

yes

Answer 4

arctan(1) = pi/4 +npi
where n is any integer

Answer 5

u know the value of cos(2pi/3)?

Answer 6

no idea

Answer 7

If you wanna know its cos (120)

Answer 8

cos(120) = cos(180-60) = -cos60

Answer 9

Learning the values of sin and cosin for the unit circle would be ideal. http://www.mathsisfun.com/geometry/unit-circle.html

Answer 10

u know cos60 ?

Answer 11

they provided me with some options

Answer 12

cos2π/3−arctan1
-1/2-pi/4 -n* pi

Answer 13

what are ur options?

Answer 14

this is one example 1−√3/2

Answer 15

3√−1/2 another option