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Byju's Answer
Standard X
Mathematics
Trigonometric Ratios
Question 1 iI...
Question
Question 1 (i)
In
Δ
ABC, right-angled at B, AB = 24 cm, BC = 7 cm. Determine:
(i) sin A, cos A
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Solution
In
Δ
A
B
C
,
∠
B
=
90
∘
By Applying Pythagoras theorem, we get:
A
C
2
=
A
B
2
+
B
C
2
=
(
24
)
2
+
7
2
=
(
576
+
49
)
c
m
2
=
625
c
m
2
⇒
AC = 25
(i)
s
i
n
A
=
B
C
A
C
=
7
25
,
c
o
s
A
=
A
B
A
C
=
24
25
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Question 1 (ii)
In
Δ
ABC, right-angled at B, AB = 24 cm, BC = 7 cm. Determine:
(ii) sin C, cos C
Q.
In
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B
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Q.
In ΔABC right angled at B, AB = 24 cm, BC = 7 cm. Determine
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