Question

Use the unit circle to find the value of each trigonometric function at the angle indicated

Answer 1

0
-1
-inf
1
0
0

repectively

Answer 2

Explanation:

We have to find the values of the given trigonometric ratios at the angle indicated. Thus,

(A) The given trigonometric function is:

`cos270^(\circ)`

Since, the function lies in Quadrant III, therefore the value of the function will be negative.

Also,
`cos270^(\circ)=-(0)=0`

(B) The given trigonometric function is:

`sin270^(\circ)`

Since, the function lies in Quadrant III, therefore the value of the function will be negative.

Also,
`sin270^(\circ)=-1`

(C) The given trigonometric function is:

`tan270^(\circ)`

Since, the function lies in Quadrant III, therefore the value of the function will be negative.

Also,

(D) The given function is:

`cos0^(\circ)`

Since, the function lies in Quadrant I, therefore the value of the function will be positive.

Also,
`cos0^(\circ)=1`

(E) The given function is:

`sin0^(\circ)`

Since, the function lies in Quadrant I, therefore the value of the function will be positive.

Also,
`sin0^(\circ)=0`

(F) The given function is:

`tan0^(\circ)`

Since, the function lies in Quadrant I, therefore the value of the function will be positive.

Also,
`tan0^(\circ)=0`