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Trigonometry Practice Test 1
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© examsnet.com
Question : 4
Total: 40
What is the value of
1
−
sin
A
cos
A
cos
A
(
sec
A
−
cosec
A
)
.
sin
2
A
−
cos
2
A
sin
3
A
+
cos
3
A
cos A
sec A
sin A
cosec A
None of these
Validate
Solution:
👈: Video Solution
1
−
sin
A
cos
A
cos
A
(
sec
A
−
cosec
A
)
.
sin
2
A
−
cos
2
A
sin
3
A
+
cos
3
A
=
1
−
sin
A
cos
A
cos
A
(
sin
A
−
cos
A
)
sin
A
cos
A
.
(
sin
A
−
cos
A
)
(
sin
A
+
cos
A
)
(
sin
A
+
cos
A
)
(
sin
2
A
+
cos
2
A
−
sin
A
cos
A
)
=
sin
A
© examsnet.com
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