Secant Calculator


Secant Calculator

Ever tried to calculate the secant of an angle and found yourself in a spin? Fear not, my trigonometrically challenged friend! We got you covered.


The secant of an angle in a right triangle is the ratio of the hypotenuse to the adjacent side. In other words, it’s the reciprocal of the cosine of an angle. So, if you know how to calculate the cosine, you’re halfway there! The formula is as simple as this:

secant(θ) = 1 / cos(θ)

Types of Secant Calculations

Range Interpretation
0-30 degrees Low secant value
30-60 degrees Medium secant value
60-90 degrees High secant value

Secant Calculation Examples

Individual Angle Calculation Result
John “Right Angle” Doe 90 degrees 1/cos(90) Undefined! Oh John…

Secant Calculation Methods

Method Advantages Disadvantages Accuracy
Direct calculation Simple Needs a calculator for non-standard angles High

Evolution of Secant Calculations

Era Development
Ancient Greece Initial definition of secant

Limitations of Secant Calculations

  1. Undefined for angles of 90 and 270 degrees

Alternative Methods

Method Pros Cons
Cosine calculation Widely used Requires reciprocal calculation for secant


  1. What is a secant calculator?

    A secant calculator is a tool that calculates the secant of an angle.

  2. Why is secant undefined at 90 and 270 degrees?

    Because the cosine of these angles is zero, and the secant is the reciprocal of the cosine.

  3. Can I use a regular calculator to calculate secant?

    Yes, you can use the cosine function and then take the reciprocal.

  4. What is the relationship between secant and cosine?

    Secant is the reciprocal of the cosine.

  5. Why do we use secant in trigonometry?

    Secant is used to simplify certain calculations and proofs.

  6. What is the range of secant?

    Secant ranges from negative infinity to -1 and 1 to positive infinity.

  7. What is the secant of 0 degrees?

    The secant of 0 degrees is 1.

  8. Is secant positive or negative in the fourth quadrant?

    The secant is positive in the fourth quadrant.

  9. What is the difference between secant and cosecant?

    Secant is the reciprocal of cosine, while cosecant is the reciprocal of sine.

  10. What is the secant of 45 degrees?

    The secant of 45 degrees is approximately 1.414.


  1. National Institute of Standards and Technology

    Provides a wealth of information on all things mathematical, including secant calculations.