IF sinA + cotA = x, then find the value of cos A in terms of x.
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Answer:
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=
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