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Stand SW 100
Tregonmitri
EXERCISES 2.1 Page 35
1)
135
12
Find the value of sin A , sin B , cos A , cos B , tan A , tan BB
AC
Answer Assignments
sin A = 13
5
13
1213
5sin B =
cos A = 13
12
cos B =
Tan A =
Tan B =
12
5
5
12
OK
EXERCISES 2.1 Page 35
2)
1
1
Find the value of sin A , sin B , cos A , cos B , tan A , tan B
B
A
C
Answer Assignments
sin A = 2
1
2
12
1sin B =
cos A = 2
1
cos B =
Tan A =
Tan B =
1
1
2
EXERCISES 2.1 Page 35
3)4
3
Find the value of sin A , sin B , cos A , cos B , tan A , tan B
B
A
C
5
Answer Assignments
sin A = 5
4
5
35
4sin B =
cos A = 5
3
cos B =
Tan A =
Tan B =
3
4
4
3
EXERCISES 2.1 Page 35
4)
4
Find the value of sin A , sin B , cos A , cos B , tan A , tan B
B
A
C
5
41
Answer Assignments
sin A = 41
4
41
541
4sin B =
cos A = 41
5
cos B =
Tan A =
Tan B =
5
4
4
5
EXERCISES 2.1 Page 35
From the image and value of tregonometry ratio find x of each following
AB
BCx sin)1
Answer Assignments
B
A
C
Opposite of A is BC
x = A
hyp
oppx sin
ok
ข้�ามฉาก
EXERCISES 2.1 Page 35
From the image and value of tregonometry ratio find x of each following
AB
ACx sin)2
Answer Assignments
B
A
C
Opposite of B is AC
x = B
hyp
oppx sin
ok
ข้�าม
ฉาก
EXERCISES 2.1 Page 35
From the image and value of tregonometry ratio find x of each following
AB
ACx cos)3
Answer Assignments
B
A
C
Adjacent of A is AC
x = A
hyp
adjx cos
ok
ชิ�ด
ฉาก
EXERCISES 2.1 Page 35
From the image and value of tregonometry ratio find x of each following
AB
BCx cos)4
Answer Assignments
B
A
C
Adjacent of B is BC
x = B
hyp
adjx cos
ok
ชิ�ด
ฉาก
EXERCISES 2.1 Page 35
From the image and value of tregonometry ratio find x of each following
BC
ACx tan)5
Answer Assignments
B
A
C
Opposite of B is AC
x = B
adj
oppx tan
ok
ข้�าม
ชิ�ด
EXERCISES 2.1 Page 35
From the image and value of tregonometry ratio find x of each following
AC
BCx tan)6
Answer Assignments
B
A
C
ข้�าม
ชิ�ด
Opposite of A is BC
x = A
ok
EXERCISES 2.1 Page 36
3. Find the tregonometry ratio
cb
B........).........4
ca
B...).........2
cb
A......).........3
ca
A....).........1
BA
C
c
ba
Answer Assignments
Sin
Cos
Cos
Sin
Example
For the trigonometric tables find the value of trigonometry
055934sin.1
057455sin.2
331.477tan.3
883.062sin.4
259.075sin.5
625.032tan.6
ok
Example
For the trigonometric tables find the value of trigonometry
?5.62sin.7
ok
Solution 883.062sin
891.063sin
มมข้อง sin เพิ่��มข้��น 1 องศา ค่�าเพิ่��มข้��น 0.891 – 0.883 = 0.008
มมข้อง sin เพิ่��มข้��น 0.5 องศา ค่�าเพิ่��มข้��น 004.01
008.05.0
ด�งน��น 887.0004883.05.62sin
Example
For the trigonometric tables find the value of trigonometry
?5.32cos.7
ok
Solution 848.032cos
839.033cos
มมข้อง cos เพิ่��มข้��น 1 องศา ค่�าลดลง 0.848 – 0.839 = 0.009
มมข้อง cosเพิ่��มข้��น 0.5 องศา ค่�าลดลง 0045.01
009.05.0
ด�งน��น 8435.00045.0848.05.32cos
Given the value of tregonometrytheFind
Example
,998.0sin 4
,927.0cos 22
,438.0sin 64
,732.3tan 75
,914.0sin 66
,391.0cos 67
ok
Homework Page 36EXERCISES 2.1
4. Find the value of trigonometice32sin)1 4sin)2
81sin)3
29cos)517sin)4 18tan)6
81tan)7 5.51sin)85.67cos)9
5.42tan)10
Homework Page 36EXERCISES 2.1
5.Determine the size of the A when sin A given to the following.
53.0)1 899.0)1
52
)3 85
)4
2315
)5
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Stand SW 100
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