10
Using your calculator, work through these exercises to gauge your ‘calculator
skills’.
1. Evaluate (a)
3
)
25
.
7
(
−
(b)
9
4
8
3
7
2
×
−
(c)
5
)
6
.
11
(
2. Evaluate (a)
°
178
sin
(b)
°
45
tan
(c) 100
log
3. Evaluate (a)
85
.
3
10
(b)
5
150
(c) 36
.
0
sin
1
−
4. Find the value of
x
for which
878
.
2
log
=
x
.
5. What is the value of
x
, given that
7
e
x
=
?
6. Perform the following:
A
→
5
,
B
→
3
,
C
→
−
4
,
D
→
5
3
,
E
→
π
. Then, evaluate
E
C
D
B
A
5
2
−
×
+
.
7. Express
(a)
°
68
.
112
(b)
'
45
245
°
(c)
5
1
2
3
650
′′
′
°
in radian.
8. Express
(a)
rad
11
.
3
(b)
rad
3
7
(c)
rad
9
.
2
−
in
degree.
9. Which is greater?
)
1
.
0
cos(
°
or
)
1
.
0
cos(
rad
?
10. Evaluate
π
+
=
−
12
log
4
2
3
x
A
B
y
where
7
=
A
,
3
1
=
B
and
97
.
2
=
x
.
To check answers please see page 20 of this booklet.
Quick Check 1