Sharp EL-9600 - Page 69

Blackline Masters/TRIGONOMETRY USING THE SHARP EL-9600 65
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Activity 3 Verify the identity tan
2
θ + 1 = sec
2
θ:
1. Access and clear the Y1 prompt.
2. Enter the tan
2
x + 1 for Y1.
3. Enter the sec
2
x for Y2.
4. Set your viewing window.
5. Check to see if they result in the same graph.
6. Sketch the graph in the box below.
Activity 4 Verify the following formulas and identities using the
steps provided in Activities 1 through 3:
1. cos 2θ = 2cos
2
θ – 1
2. csc
2
θ – cot
2
θ = 1
3. tan θ csc θ = sec θ
GRAPHICAL VERIFICATION OF FORMULAS AND IDENTITIES
3.5
NAME _____________________________________________________ CLASS __________ DATE __________