Introduction To Trigonometry
> Question
VSA
1 mark
Year: 2020
Easy
CBSE Class 10
trigonometry
identities
Question
If
sin
A
+
sin
2
A
=
1
, then find the value of the expression
(
cos
2
A
+
cos
4
A
)
.
Solution
1
sin
A
=
1
−
sin
2
A
=
cos
2
A
+0.5 marks
2
cos
2
A
+
cos
4
A
=
sin
A
+
sin
2
A
=
1
+0.5 marks
Practice this question interactively with step-by-step AI feedback
Sign up for SuperPadhai