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Maths CBSE Live product
Class 10 (2025-26)
Introduction to trigonometry
PT2 Revision - Introduction to trigonometry
3.
Show the given trigonometric equation
Question:
5
m.
Answer variants:
sin
A
1
+
cos
A
+
sin
A
1
−
cos
A
1
+
cos
A
1
−
cos
A
2
sin
A
sin
2
A
2
sin
A
2
sin
A
1
−
cos
2
A
sin
A
−
sin
A
cos
A
+
sin
A
+
sin
A
cos
A
1
−
cos
2
A
sin
A
1
−
cos
A
+
sin
A
1
+
cos
A
1
+
cos
A
1
−
cos
A
sin
A
+
sin
A
cos
A
+
sin
A
+
sin
A
cos
A
1
−
cos
2
A
Show
that
sin
A
1
+
cos
A
+
sin
A
1
−
cos
A
\(=\)
2
cosec
A
.
Proof
:
LHS \(=\)
sin
A
1
+
cos
A
+
sin
A
1
−
cos
A
\(=\)
\(=\)
\(=\)
\(=\)
\(=\)
\(=\)
2
cosec
A
\(=\) RHS
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