Question

which one of the following is not defined?
A) sin 90° B) cos 0° c) sec 90° D) cos 90°
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Answer 1

Option c is the right answer

Sec 90°

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Answer 2

Answer:

c) sec = 90⁰

because, sec = 1/cos 90⁰ = 1/0

if any no. having denominator 0 that is called not defined number

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