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Darrel Mikki
Subject: Maths
, asked on 27/3/18
Q. If sin
θ
+ cos
θ
=
2
, then evaluate : tan
θ
+ cot
θ
Answer
1
Ananye
Subject: Maths
, asked on 27/3/18
Please give me questions for trignometric identities except sin2theta plus cos2theta equals to one
Answer
2
Abhishek
Subject: Maths
, asked on 27/3/18
Solve from some other method
Q. Example 15
: Prove that
sin
θ
–
cos
θ
+
1
sin
θ
+
cos
θ
–
1
=
1
sec
θ
–
tan
θ
, using the identity sec
2
θ
= 1+ tan
2
θ
.
Answer
1
Deeya Katyal
Subject: Maths
, asked on 27/3/18
Q53 pls
Q53. Prove that
1
cos
θ
+
sin
θ
+
1
+
1
cos
θ
+
sin
θ
–
1
=
cosec
θ
+
secθ
.
Answer
3
Simran Dalvi
Subject: Maths
, asked on 27/3/18
Solve this :
2
.
x
=
a
cos
3
θ
,
y
=
b
sin
2
θ
To
prove
:
x
a
2
3
+
y
b
2
3
=
1
3
.
cosec
θ
-
sin
θ
=
a
3
sec
θ
-
cos
θ
=
b
3
Prove
that
:
a
2
b
2
(
a
2
+
b
2
)
=
1
.
Answer
2
Simran Dalvi
Subject: Maths
, asked on 27/3/18
Solve this :
56
.
If
sin
θ
+
2
cos
θ
=
1
prove
that
2
sin
θ
-
cos
θ
=
2
.
Answer
2
Yash Behl
Subject: Maths
, asked on 27/3/18
13. In an isosceles triangle ABC with AB = AC, BD is perpendicular from B to the side AC. Prove that :-
B
D
2
-
C
D
2
=
2
C
D
.
A
D
15. Prove that:
S
i
n
A
s
e
c
A
+
tan
A
-
1
+
cos
A
cos
e
c
A
+
c
o
t
A
-
1
=
1
Answer
1
Bincy K Biju
Subject: Maths
, asked on 27/3/18
Evaluate : 3cos55/7sin35 - 4(cos70 cosec20)/7(tan5 tan25 tan45 tan65 tan85)
Answer
1
Payal Arora
Subject: Maths
, asked on 27/3/18
Q. l sin
θ
+ m cos
θ
+n =0
l'sin
θ
+m'cos
θ
+n' =0
Prove that:
m
n
'
-
n
m
'
2
+
n
l
'
-
ln
'
2
=
l
m
'
-
m
l
'
2
Answer
1
Prakhar
Subject: Maths
, asked on 27/3/18
12. If
a
cos
θ
+
b
sin
θ
=
c
,
t
h
e
n
p
r
o
v
e
t
h
a
t
:
a
sin
θ
-
b
cos
θ
=
±
a
2
+
b
2
-
c
2
.
Answer
2
Harshita
Subject: Maths
, asked on 26/3/18
if a costheta- b sintheta=c, prove that (a sintheta+ b costheta)=
+
rt a
2
+b
2
-c
2
.
Answer
1
Amit Rana
Subject: Maths
, asked on 26/3/18
Q. Prove that
tan
θ
(
1
+
tan
2
θ
)
2
+
c
o
t
θ
(
1
+
c
o
t
2
θ
)
2
=
sin
θ
cos
θ
Answer
2
Raghav Singh
Subject: Maths
, asked on 26/3/18
Q. Please tell how is this possible.
=
cos
e
c
A
+
1
c
o
t
A
=
s
e
c
A
+
tan
A
Answer
2
Raghav Singh
Subject: Maths
, asked on 26/3/18
Answer
2
Ishan
Subject: Maths
, asked on 26/3/18
Prove that SinA - cosA\sinA + cosA = 1+ tansquareA
Answer
1
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What are you looking for?
Q. Example 15 : Prove that , using the identity sec2 = 1+ tan2 .
Q53. Prove that .
15. Prove that:
Q. l sin + m cos +n =0
l'sin+m'cos+n' =0
Prove that:
rt a2+b2-c2.