   Chapter 8.2, Problem 29E ### Calculus: An Applied Approach (Min...

10th Edition
Ron Larson
ISBN: 9781305860919

#### Solutions

Chapter
Section ### Calculus: An Applied Approach (Min...

10th Edition
Ron Larson
ISBN: 9781305860919
Textbook Problem
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# Evaluating Trigonometric Functions In Exercises 19-32, evaluate the six trigonometric functions of the angle without using a calculator. See Examples 2 and 3. 750 °

To determine

To calculate: The value of six trigonometric functions of an angle 750° without using a calculator.

Explanation

Given Information:

The angle is 750°.

Formula used:

Trigonometric values of Common angles:

 θ(degrees) 0° 30° 45° 60° 90° 180° 270° θ(radians) 0 π6 π4 π3 π2 π 3π2 sinθ 0 12 22 32 1 0 −1 cosθ 1 32 22 12 0 −1 0 tanθ 0 33 1 3 Undefined 0 Undefined

Calculation:

Consider the angle,

θ=750°

First, find the reference angle of θ=750°.

reference angle of 750°=750°2(360°)=750°720°=30°

All trigonometric functions are positive in the I quadrant.

So, we can write the six trigonometric functions as,

sin(750°)=sin(30°)cos(750°)=cos(30°)tan(750°)=tan(30°)csc(750°)=csc(30°)

Remaining trigonometric functions as,

sec(750°)=sec(30°)cot(750°)=cot(30°)

Now, evaluate the value of six trigonometric functions for reference angle θ=30° using Trigonometric values of common angles

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