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Byju's Answer
Standard IX
Mathematics
Use of Trigonometric Table
If x≠ 0, th...
Question
If
x
≠
0
, then
1
+
sec
x
+
sec
2
x
+
sec
3
x
+
sec
4
x
+
sec
5
x
is equal to
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Solution
1
+
sec
x
.
.
.
+
sec
5
x
=
(
sec
6
x
−
1
sec
x
−
1
)
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