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CU-A_18-19
CU-A_14-15
HSC - উচ্চতর গণিত ১ম পত্র
→
অধ্যায়-০৬ঃ ত্রিকোণমিতিক অনুপাত
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1
−
sin
A
1
+
sin
A
=
?
\sqrt{\frac{1-\sin A}{1+\sin A}}=?
1
+
s
i
n
A
1
−
s
i
n
A
=
?
A.
c
o
s
A
cosA
cos
A
B.
s
e
c
A
+
t
a
n
A
secA + tanA
sec
A
+
t
an
A
C.
t
a
n
A
−
s
e
c
A
tanA-secA
t
an
A
−
sec
A
D.
s
e
c
A
−
t
a
n
A
secA-tanA
sec
A
−
t
an
A
Guide Answer
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