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Byju's Answer
Standard XII
Mathematics
Trigonometric Equations
Evaluate 20...
Question
Evaluate
sec
20
∘
c
o
s
e
c
70
∘
Open in App
Solution
sec
20
°
c
o
s
e
c
70
°
=
sec
(
90
°
−
70
°
)
c
o
s
e
c
70
°
=
c
o
s
e
c
70
°
c
o
s
e
c
70
°
=
1
Hence, the answer is
1.
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Solve:
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Q.
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9 sec70° sin20° + cosec70° cos20° =
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The value of
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