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अर्कज
Subject: Maths
, asked on 19/5/18
No links
Q. The simplified form of the expression
2
+
2
+
2
+
2
cos
8
θ
is
A. 4 cos 2
θ
B. 4 cos
θ
C. 2 cos 2
θ
D. 2 cos
θ
Answer
1
अर्कज
Subject: Maths
, asked on 19/5/18
sin(40° –
x
) × cos(20° –
x
) + cos(40° –
x
) × sin(20° –
x
)
For what value of
x
(0 ≤
x
≤ 90°) is the given equation correct?
(A) 0° (B) 5° (C) 15° (D) 20°
Answer
1
अर्कज
Subject: Maths
, asked on 19/5/18
Use the following information to answer the next question.
If, then what is the simplified form of the given expression?
Answer
1
अर्कज
Subject: Maths
, asked on 17/5/18
Solve this:
Question
No
.
2
The
expression
.
sin
90
o
+
15
cosec
-
15
o
cot
180
o
-
15
cosec
360
o
-
15
cos
180
o
+
15
tan
90
o
-
15
is
equal
to
.
A
-
1
B
1
2
C
1
D
-
1
2
Answer
2
अर्कज
Subject: Maths
, asked on 17/5/18
Solve this:
Question No. 1
If
tan
35
°
a
,
then
the
expression
tan
215
o
+
tan
125
o
tan
235
o
-
tan
325
o
,
when
writen
in
terms
of
a
,
is
A
a
2
+
1
/
a
2
-
1
B
1
+
a
2
/
1
-
a
2
C
a
2
-
1
/
a
2
+
1
B
1
-
a
2
/
1
+
a
2
Answer
1
Ghosh Brothers
Subject: Maths
, asked on 15/5/18
Question no. 12 please
12
.
sin
2
160
°
+
sin
2
140
°
+
sin
2
100
°
=
(
a
)
1
2
(
b
)
3
2
(
c
)
5
2
(
d
)
7
2
Answer
3
अर्कज
Subject: Maths
, asked on 15/5/18
Find the value of (-1710 degree ). No links
Answer
2
अर्कज
Subject: Maths
, asked on 15/5/18
Explain:
Answer
1
अर्कज
Subject: Maths
, asked on 14/5/18
Explain the concept
Answer
1
अर्कज
Subject: Maths
, asked on 14/5/18
Explain the concept
Answer
1
अर्कज
Subject: Maths
, asked on 14/5/18
Solve this:
Answer
1
अर्कज
Subject: Maths
, asked on 14/5/18
Solve this:
Answer
1
अर्कज
Subject: Maths
, asked on 14/5/18
Explain the concept
16
.
tan
2
x
=
2
tan
x
1
-
tan
2
x
i
f
2
x
≠
n
π
+
π
2
,
where
n
is
an
integer
Answer
1
अर्कज
Subject: Maths
, asked on 14/5/18
Q. Explain the concept
(
i
)
cos
x
+
cos
y
=
2
cos
x
+
y
2
cos
x
-
y
2
Answer
1
अर्कज
Subject: Maths
, asked on 14/5/18
Solve this :
Explain the concept and remarks
21.
(i) 2 cos x cos y = cos (x + y) + cos (x - y)
(ii) - 2 sin x sin y = cos (x + y) - cos (x - y)
(iii) 2 sin x cos y = sin (x + y) + sin (x - y)
(iv) 2 cos x sin y = sin (x + y) - sin (x - y)
Answer
2
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What are you looking for?
Q. The simplified form of the expression is
A. 4 cos 2
B. 4 cos
C. 2 cos 2
D. 2 cos
For what value of x(0 ≤ x ≤ 90°) is the given equation correct?
(A) 0° (B) 5° (C) 15° (D) 20°
If, then what is the simplified form of the given expression?
Question No. 1
21.
(i) 2 cos x cos y = cos (x + y) + cos (x - y)
(ii) - 2 sin x sin y = cos (x + y) - cos (x - y)
(iii) 2 sin x cos y = sin (x + y) + sin (x - y)
(iv) 2 cos x sin y = sin (x + y) - sin (x - y)