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Standard IX
Mathematics
Question
If
x
=
15
∘
, evaluate :
4
cos
2
x
⋅
sin
4
x
⋅
tan
3
x
−
1
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Solution
Verified by Toppr
Given,
x
=
15
∘
Now,
4
cos
2
x
sin
4
x
tan
3
x
−
1
=
4
(
cos
30
)
(
sin
60
)
(
tan
45
)
−
1
=
4
⋅
√
3
2
⋅
√
3
2
⋅
1
−
1
=
3
−
1
=
2
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4
Similar Questions
Q1
If
x
=
15
∘
, evaluate :
4
cos
2
x
⋅
sin
4
x
⋅
tan
3
x
−
1
View Solution
Q2
If
5
(
1
−
2
x
)
=
15
; evaluate
x
2
−
3
x
+
2
.
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Q3
Evaluate:
x
+
1
5
−
x
−
7
2
=
1
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Q4
Evaluate:
lim
x
→
0
(
x
+
1
)
5
−
1
x
View Solution
Q5
If
x
=
15
0
, evaluate:
4
cos
2
x
sin
4
x
tan
3
x
−
1
View Solution