1
You visited us
1
times! Enjoying our articles?
Unlock Full Access!
Byju's Answer
Standard X
Mathematics
Standard Values of Trigonometric Ratios
prove that co...
Question
prove that cot x cot 2x- cot 2xcot3x - cot 3x cot x=1
Open in App
Solution
LHS
=
cotx
cot
2
x
-
cot
2
x
cot
3
x
-
cot
3
x
cotx
=
cot
2
x
cotx
-
cot
3
x
-
cot
3
x
cotx
=
cos
2
x
sin
2
x
cosx
sinx
-
cos
3
x
sin
3
x
-
cot
3
x
cotx
=
cos
2
x
sin
2
x
sin
3
x
cosx
-
cos
3
x
sinx
six
sin
3
x
-
cos
3
x
cosx
sin
3
x
sinx
using
formula
;
sin
A
-
B
=
sinAcosB
-
cosAsinB
=
cos
2
x
sin
2
x
×
sin
2
x
sinx
sin
3
x
-
cos
3
x
cosx
sin
3
x
sinx
=
cos
2
x
-
cos
3
x
cosx
sinx
sin
3
x
=
cos
2
x
-
1
2
cos
3
x
+
x
+
cos
3
x
-
x
sinx
sin
3
x
as
,
2
cosAcosB
=
cos
A
+
B
+
cos
A
-
B
=
cos
2
x
-
1
2
cos
4
x
+
cos
2
x
sinx
sin
3
x
=
1
2
cos
2
x
-
cos
4
x
sin
x
.
sin
3
x
=
1
2
-
2
sin
3
x
.
sin
-
x
sin
x
.
sin
3
x
=
sin
3
x
sinx
sin
3
x
sinx
=
1
=
RHS
Suggest Corrections
0
Similar questions
Q.
Prove
cot
x
cot
2
x
−
cot
2
x
cot
3
x
−
cot
3
x
cot
x
=
1
Q.
Prove that
cot
x
.
cot
2
x
−
cot
2
x
.
cot
3
x
−
cot
x
.
cot
3
x
=
1
Q.
prove that
cotx.cot2x-cot2x.cot3x-cot3x.cotx=1
Q.
Prove that:
cot
x
cot
2
x
−
cot
2
x
cot
3
x
−
cot
3
x
cot
x
=
1
Q.
Prove that
csc
2
x
+
cot
2
x
=
cot
x
View More
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
Related Videos
Standard Values of Trigonometric Ratios
MATHEMATICS
Watch in App
Explore more
Standard Values of Trigonometric Ratios
Standard X Mathematics
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
Solve
Textbooks
Question Papers
Install app