The length of missing sides x = 5 units and y = 5 units.
<h3>What is Trigonometric ratios?</h3><h3>The six trigonometric ratios are sine (sin), cosine (cos), tangent (tan), cotangent (cot), cosecant (cosec), and secant (sec).</h3>
In ΔABC,
AB (Base) = y , BC(Hypotenuse) = , CA (perpendicular) = x
and ∠ABC =
Now,
tan = perp. / base
1 = x /y
x= y .................(i)
again,
sin = perp. / Hypo.
x = 5
put in equation (i), we get
y = 5
Thus, the length of missing side of the given triangle is x = 5 units and y = 5 units.
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keeping in mind that perpendicular lines have negative reciprocal slopes, let's check for the slope of the equation above
since we know that's its slope, then
so then we're really looking for the equation of a line whose slope is -2 and passes through (2 , 1)
Since the ground already has an elevation of 15 degrees, the ladder needs to
be set at 60 degrees to reach a height of 10 ft.
In order for a ladder to reach a height of 10 feet, the ladder needs to be
placed at 75 degrees angle to the ground. This is when the ground has no
angle of elevation or when it flat.
Now, if the ground has an angle of elevation of 15 degrees , the degrees in
angle the ladder needs to be set can be solved as follows:
<h3>Angles in degree: </h3>
Therefore, the ladder needs to set at an angle of 60 degrees if the
elevation of the ground is already 15 degree. The elevation of the ground
will complement the angle in degrees required for the ladder to reach 10
feet.
learn more on elevation: brainly.com/question/9195919?referrer=searchResults
Answer:
Option (D) is correct.
Step-by-step explanation:
In a triangle BCD , with b, c, d as the sides of triangle.
Sine rule states when we we divide side b by the sine of angle B then it is equal to side c divided by the sine of angle C and also equal to side d divided by the sine of angle D.
Using Sine rule,
Consider the first and third ratio,
Substitute the values of d = 3 , b= 5 and ∠D=25°
Thus, Measure of angle B is 45 and 135 as sinB is positive is first and 2nd quadrant.
Thus, option (D) is correct.