1
You visited us
1
times! Enjoying our articles?
Unlock Full Access!
Byju's Answer
Standard XII
Mathematics
Trigonometric Ratios of Common Angles
Prove that : ...
Question
Prove that :
t
a
n
1
∘
t
a
n
11
∘
t
a
n
21
∘
t
a
n
69
∘
t
a
n
79
∘
t
a
n
89
∘
=
1
Open in App
Solution
L
H
S
=
tan
1
∘
tan
11
∘
tan
21
∘
tan
69
∘
tan
79
∘
tan
89
∘
=
tan
1
∘
tan
11
∘
tan
21
∘
tan
(
90
∘
−
21
∘
)
tan
(
90
∘
−
11
∘
)
tan
(
90
∘
−
1
∘
)
=
tan
1
∘
tan
11
∘
tan
21
∘
cot
21
∘
cot
11
∘
cot
1
∘
=
tan
1
∘
tan
11
∘
tan
21
∘
tan
21
∘
tan
11
∘
tan
1
∘
=
1
Suggest Corrections
0
Similar questions
Q.
Prove that
tan
69
°
+
tan
66
°
1
-
tan
69
°
tan
66
°
=
-
1
.
Q.
Write
the
value
of
tan
1
°
tan
2
°
.
.
.
tan
89
°
.
Q.
prove that
tan
1
∘
tan
2
∘
tan
3
o
.
.
.
.
.
.
tan
89
∘
=
1
Q.
tan
1
∘
tan
2
∘
tan
3
∘
.
.
.
tan
89
∘
=
Q.
Prove the following :
sin
(
50
∘
+
θ
)
−
cos
(
40
∘
−
θ
)
+
tan
1
∘
tan
10
∘
tan
20
∘
tan
70
∘
tan
80
∘
tan
89
∘
=
1
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
Trigonometric Ratios of Special Angles
MATHEMATICS
Watch in App
Explore more
Trigonometric Ratios of Common Angles
Standard XII 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