2 cos? A-1
cot A - tan A =
sin A cos A
Answers
Answered by
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Step-by-step explanation:
Answer
cotA−tanA
=
sinA
cosA
−
cosA
sinA
=
sinAcosA
cos
2
A−sin
2
A
=
sinAcosA
cos
2
A−(1−cos
2
A)
=
sinAcosA
2cos
2
A−1
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