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Byju's Answer
Standard IX
Mathematics
Values of Trigonometric Ratios
Prove that ...
Question
Prove that
sin
−
1
4
5
+
sin
−
1
7
25
=
sin
−
1
117
125
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Solution
sin
−
1
4
5
+
sin
−
1
7
25
=
sin
−
1
117
125
sin
−
1
A
+
sin
−
1
B
=
sin
−
1
(
A
√
1
−
B
2
+
B
√
1
−
A
2
)
=
sin
−
1
(
4
5
√
1
−
49
625
+
7
25
√
1
−
16
25
)
=
sin
−
1
(
4
5
√
576
625
+
7
25
√
9
25
)
=
sin
−
1
(
4
5
×
24
25
+
7
25
×
3
5
)
=
sin
−
1
(
96
125
+
21
125
)
=
sin
−
1
(
117
125
)
. H.P.
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