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Byju's Answer
Standard XII
Mathematics
Properties Derived from Trigonometric Identities
If sin-1x+sin...
Question
If
s
i
n
−
1
x
+
s
i
n
−
1
y
+
s
i
n
−
1
z
=
π
2
, then
x
2
+
y
2
+
z
2
+
2
x
y
z
=
A
\N
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B
1
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C
-1
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D
None
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Solution
The correct option is
B
1
Given Expression
⇒
c
o
s
−
1
√
(
1
−
x
2
)
+
c
o
s
−
1
√
(
1
−
y
2
)
=
π
2
−
s
i
n
−
1
z
⇒
√
[
(
1
−
x
2
)
(
1
−
y
2
)
]
−
x
y
=
z
⇒
(
1
−
x
2
)
(
1
−
y
2
)
=
(
x
y
+
z
)
2
⇒
x
2
+
y
2
+
z
2
+
2
x
y
z
=
1
Suggest Corrections
5
Similar questions
Q.
If
s
i
n
−
1
x
+
s
i
n
−
1
y
+
s
i
n
−
1
z
=
π
2
,
t
h
e
n
x
2
+
y
2
+
z
2
+
2
x
y
z
=
Q.
If
sin
−
1
x
+
sin
−
1
y
+
sin
−
1
z
=
π
2
,
then the value of
x
2
+
y
2
+
z
2
+
2
x
y
z
is equal to
Q.
If
sin
−
1
x
+
sin
−
1
y
+
sin
−
1
z
=
π
, prove that
x
√
1
−
x
2
+
y
√
1
−
y
2
+
z
√
1
−
z
2
=
2
x
y
z
.
Q.
If
sin
−
1
x
+
sin
−
1
y
+
sin
−
1
z
=
3
π
2
, then find the minimum value of
x
2
+
y
2
+
z
2
Q.
If
cos
−
1
x
+
cos
−
1
y
+
cos
−
1
z
=
π
then, prove that
x
2
+
y
2
+
z
2
+
2
x
y
z
=
1
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