. (sec A + tan A ) ( 1 – sin A) = ____________ *
1 point
A. sin A
B. cos A
C. sec A
D. cot A
Answers
Answered by
3
Answer:
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Step-by-step explanation:
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Answered by
1
Answer:
Correct option is
D
cosA.
(secA+tanA)(1−sinA)
=(
cosA
1
+
cosA
sinA
)(1−sinA)
=(
cosA
1+sinA
)(1−sinA)
=
cosA
(1+sinA)(1−sinA)
=
=
cosA
(1−sin
2
A)
=
cosA
cos
2
A
=cosA
∴(secA+tanA)(1−sinA)=cosA
Hence, the answer is cosA.
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