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Byju's Answer
Standard IX
Mathematics
Why Trigonometry
21. Prove tha...
Question
21. Prove that - tan15^°+cot 15^°=4
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Similar questions
Q.
Find tan
15
∘
and show that tan
15
∘
+ cot
15
∘
= 4
Q.
Prove that :
tan
10
o
tan
15
o
tan
75
o
tan
80
o
=
1
Q.
Prove that :
4cos2A
cot(A+15°) – tan(A - 15°) = ----------------
1+ 2sin2A
Q.
Prove that
cot
(
π
4
−
2
cot
−
1
3
)
=
7
Q.
Prove that
sec
2
(
tan
−
1
2
)
+
csc
2
(
cot
−
1
3
)
=
15
.
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