Evaluate a trigonometric angle when given in degrees minutes seconds

The video tutorial guides viewers on setting their calculators to degree mode, converting angles from degrees and minutes to decimal form, and understanding the reciprocal relationship between secant and cosine. It demonstrates how to calculate the secant of an angle using the cosine function on a calculator, emphasizing the importance of reciprocal identities in trigonometry.

What is the first step to take when evaluating angles using a calculator?

• Turn off the calculator

• Ensure the calculator is in degree mode

• Switch to scientific mode

• Ensure the calculator is in radian mode

How are secant and cosine functions related?

• Cosine is the reciprocal of secant

• Secant is the reciprocal of cosine

• Secant is the square of cosine

• They are equal to each other

What is the reciprocal of the cosine function?

• Secant

• Sine

• Cotangent

• Tangent

How do you convert 42 degrees and 12 minutes into decimal form?

• 42.02

• 42.2

• 42.12

• 42.5

What is the secant of 42 degrees and 12 minutes approximately?

• 1.3489

• 1.34

• 1.3498

• 1.35