Blackline Masters/TRIGONOMETRY USING THE SHARP EL-9600
65
Cop
yr
ight ©
1998, Shar
p Electronics Cor
por
ation.
P
e
rmission is g
ranted to photocop
y f
or educational use only
.
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 2
θ
= 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 __________