How to use even and odd identities to solve a trig equation with secant

The video tutorial explains the concept of even and odd functions, focusing on secant and cosine. It highlights the use of identities to understand these functions and discusses the reciprocal relationship between secant and cosine. The tutorial also covers how to use the unit circle to find specific cosine values and solve for angles using reference angles. The instructor emphasizes understanding these concepts to avoid confusion and solve problems effectively.

Which of the following functions is considered an even function?

• Sine

• Tangent

• Cosecant

• Secant

What is the reciprocal of the cosine function?

• Sine

• Secant

• Tangent

• Cosecant

When rationalizing the denominator, what is the simplified form of -3√3/6?

• -√2/3

• -√3/2

• -3/2

• -1/2

In which quadrants is the cosine function negative?

• First and Fourth

• Third and Fourth

• Second and Third

• First and Second

What are the angles in radians where cosine equals -√3/2?

• π/6 and 5π/6

• 5π/6 and 7π/6

• π/3 and 2π/3

• 7π/6 and 11π/6