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UPSC CDS Math Trigonometric Ratios and Trigonometric Identities Questions
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© examsnet.com
Question : 5
Total: 107
W hat is the value of
sin
46
°
cos
44
°
+
cos
46
°
sin
44
°
?
[2019 CDS-I]
sin 2°
0
1
2
Validate
Solution:
sin
46
∘
cos
44
∘
+
cos
46
∘
sin
44
∘
=
sin
46
∘
cos
(
90
∘
−
46
∘
)
+
cos
46
∘
sin
(
90
∘
−
46
∘
)
=
sin
46
∘
sin
46
∘
+
cos
46
∘
cos
46
∘
=
sin
2
46
∘
+
cos
2
46
∘
=
1
© examsnet.com
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