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Ashu638
27.06.2020 •
Mathematics
(05.01 MC) In triangle JKL, tan(b°) = three fourths and cos(b°) =four fifths. If triangle JKL is dilated by a scale factor of one half, what is sin(b°)? PLEASE HELP! triangle KL in which angle K is a right angle and angle L measures b degrees sin(b°) = three fifths sin(b°) = four fifths sin(b°) = five thirds sin(b°) = five fourths
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Ответ:
Step-by-step explanation:
We are given a
where ![\angle K = 90^\circ](/tpl/images/0696/2151/ca839.png)
As per trigonometric rules,
Comparing the given value of tangent and cosine:
Perpendicular = 3 units
Base = 4 units
Hypotenuse = 5 units
Also, we know that:
Now, it is given that the triangle is dilated by a scale factor of
.
i.e. all the sides will become half of its initial values.
New Perpendicular = 1.5 units
New Base = 2 units
New Hypotenuse = 2.5 units
Using the formula for sine:
Ответ:
100 kilometers
Step-by-step explanation:
In her first week of training, she runs = 10 km
In her second week she runs = 15 km.
In her third week she runs = 25 km
In fourth week she runs = 50 km.
Total distance she run in her training = 10 + 15 + 25 + 50
= 100 km.
She runs 100 kilometers in total in her training before race.