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Standard XI
Mathematics
NCERT
Question
Find the value of:
(i)
sin
75
o
(ii)
tan
15
o
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Solution
Verified by Toppr
i)
sin
75
o
=
sin
(
90
o
−
15
o
)
=
cos
15
o
{
s
i
n
(
90
o
−
A
)
=
cos
A
}
using identity
cos
A
2
=
√
1
+
cos
A
2
put
A
=
30
o
in above identity
Therefore,
cos
15
o
=
√
1
+
cos
30
o
2
=
√
√
3
+
2
2
ii)
tan
15
o
=
√
sec
2
15
o
−
1
=
√
1
cos
2
15
o
−
1
=
√
2
−
√
3
2
+
√
3
from(i)
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Similar Questions
Q1
Find the value of:
(i)
sin
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o
(ii)
tan
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o
View Solution
Q2
Find value
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tan
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Find the value of
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Q4
Find the value of:
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