if 16 cot A = 12 , then find value of sinA + cosA / sinA - cosA
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Answered by
43
cot A =16/12=b/p or h=20 sinA+ cosA/ sin A- Cos A= 28/3
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Answered by
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16cotA=12
cotA=12/16
[cotA=12/16=base/perpendicular]
By PYTHAGORAS THEOREM,
(base)²+(perpendicular)²=(hypotenuse)²
⇒(16)²+(12)²=(hypotenuse)²
⇒√(256)+(144)
⇒√400=20
Hence,hypotenuse=20
sinA=perpendicular/hypotenuse=
cosA=base/hypotenuse=
Now solving according to equation given,
We get,
sinA+cosA/sinA-cosA
=/
=
=
=7
.·.Answer is 7
cotA=12/16
[cotA=12/16=base/perpendicular]
By PYTHAGORAS THEOREM,
(base)²+(perpendicular)²=(hypotenuse)²
⇒(16)²+(12)²=(hypotenuse)²
⇒√(256)+(144)
⇒√400=20
Hence,hypotenuse=20
sinA=perpendicular/hypotenuse=
cosA=base/hypotenuse=
Now solving according to equation given,
We get,
sinA+cosA/sinA-cosA
=/
=
=
=7
.·.Answer is 7
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