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RRB Junior Engineer Stage 1 Model Papers 5
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© examsnet.com
Question : 6
Total: 100
Find the value of
tan
4
°
tan
43
°
tan
47
°
tan
86
°
1
2
3
2
sin
θ
+
sin
2
θ
Validate
Solution:
tan
4
°
tan
43
°
tan
47
°
tan
86
°
tan
(
90
°
–
86
°
)
×
tan
(
90
°
–
47
°
)
×
tan
47
°
×
tan
86
°
⇒
cot
86
°
×
cot
47
°
×
tan
47
°
×
tan
86
°
⇒
1
© examsnet.com
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