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Aryan Buchanan
Today, 13:28
Cos (sin15/17 - (sin-5/13)
+2
Answers (
1
)
Rory Hickman
Today, 15:00
0
If sin
=5/13
then the ratio of opposite side/hypotenuse
=5/13
By Pythagorean Theorem
If opposite side = 5units and
hypotenuse = 13 units
(for any units)
then adjacent side=12 units
and
cos=adjacent side over
hypotenuse = 12/13
However, we need to note that if the angle is in Quadrant II then the
adjacent side
will actually be a negative value
so
cos = 12/13 for an angle in Q1
or
cos = - 12/13 for an angle in Q2
(angle can't be in Q3 or Q4, since sin > 0)
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