Question

Check all that apply. sec is undefined for = _____.

Answer 1

Anywhere that cosine is equal to 0, so, pi/2, 3pi/2,...any odd integer times pi/2

Answer 2

Answer with explanation:

Secant of any angle is inverse of Cosine.

⇒Value of Sec of an angle for various Angles

Sec 0°=1

Sec 30°
`=(2)/(√(3))`

Sec 45°
`=√(2)`

Sec 60°=2

Sec 90°=Not Defined

→→Sec is undefined for , odd multiple of 90°.

That is, Theta

`=(2k+1)(\pi)/(2)`

where, k=............-6,-5,-4,-3,-2,-1,0,1,2,3,4.........