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Answer:
Refer to attachment
Third step Explanation:
More identities:
↦ sin² A + cos² A = 1
↦ cos²A - Sin²A = Cos2A
↦ 1+tan² A = sec² A
↦ cosec² A = 1 + cot² A
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tan
(
θ
2
)
+
cot
(
θ
2
)
=
sin
(
θ
2
)
cos
(
θ
2
)
+
cos
(
θ
2
)
sin
(
θ
2
)
=
sin
2
(
θ
2
)
+
cos
2
(
θ
2
)
sin
(
θ
2
)
cos
(
θ
2
)
=
1
sin
(
θ
2
)
cos
(
θ
2
)
=
2
2
sin
(
θ
2
)
cos
(
θ
2
)
=
2
sin
θ
=
2
csc
θ
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