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11 grade maths others

How do you find the value of sec 90°?

Profile image of Aniket Singh
11 Months agoGrade
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1 Answer

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ApprovedApproved Tutor Answer11 Months ago

To find the value of sec 90°, we first need to understand what secant means. The secant function is defined as the reciprocal of the cosine function.

Understanding Cosine at 90°

The cosine of 90° is equal to 0. This is a key point because the secant function is calculated as:

  • sec(θ) = 1/cos(θ)

Calculating sec 90°

Using the definition of secant, we can substitute 90° into the equation:

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

Since division by zero is undefined, we conclude that:

Final Result

The value of sec 90° is undefined.

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