Mathematics: Select all that are undefined. sec (45°) csc (0°) sec (90°)

Select all that are undefined. sec (45°) csc (0°)

emmmssss21

13.03.2022

csc (0°) and sec (90°) are not defined.

Step-by-step explanation:

Given the options wehave to select the option which is undefinesd

First option: sec 45°

$sec45^{\circ}=\frac{1}{cos(45^{\circ})}=\frac{1}{\frac{1}{\sqrt2}}=\sqrt2$

which is defined

Second option: csc(0°)

$csc(0^{\circ})=\frac{1}{sin0}=\frac{1}{0}=\infty$

which is not defined

Third option: sec(90°)

$sec(90^{\circ})=\frac{1}{cos(90)}=\frac{1}{0}=\infty$

which is not defined.

Hence, option 2 and 3 are not defined.

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ale1910

13.03.2022

Sec(45°) = 1/cos(45°) = 1/(rt(2)/2) = rt(2)

csc(0°) = 1/sin(0°) = 1/0 /undefined/

sec(90°) = 1/cos(90°) = 1/0 /undefined/

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queenfan1818

27.07.2021

8x - 2y = -14

16x - 6y = -18

Step-by-step explanation:

I haven't done this in a long time, but I believe my answer is correct.

Hope this helps!

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