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Byju's Answer
Standard XII
Mathematics
Principal Solution of Trigonometric Equation
Show that c...
Question
Show that
cos
4
A
+
sin
4
A
+
2
sin
2
A
cos
2
A
=
1
Open in App
Solution
(
cos
2
A
)
2
+
(
sin
2
A
)
2
+
2
sin
2
A
cos
2
A
(
sin
2
A
+
cos
2
A
)
2
=
(
1
)
2
[
∵
a
2
+
b
2
+
2
a
b
=
(
a
+
b
)
2
]
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Principal Solution of Trigonometric Equation
Standard XII Mathematics
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