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Standard XII
Mathematics
Question
Without using the trigonometric tables, find
a)
cos
75
o
b)
tan
75
o
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Solution
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2
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a)
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b)
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b)
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Q5
(a) Without using trigonometric tables evaluate:
s
i
n
35
∘
c
o
s
55
∘
+
c
o
s
35
∘
s
i
n
55
∘
c
o
s
e
c
2
10
∘
−
t
a
n
2
80
∘
(b) Evaluate without using trigonometric tables:
c
o
s
2
26
∘
+
c
o
s
64
∘
s
i
n
26
∘
+
t
a
n
36
∘
c
o
t
54
∘
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