to stay healthy we should drink 6 1/2 glasses of water a day. if we follow guidelines how much water would we drink in a full we
1 answer:
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Answer:
OPTION C: Sin C - Cos C = s - r
Step-by-step explanation:
ABC is a right angled triangle. ∠A = 90°, from the figure.
Therefore, BC = hypotenuse, say h
Now, we find the length of AB and AC.
We know that:
and
Given, Sin B = r and Cos B = s
⇒
⇒
Hence, the length of the side AC = rh
Now, to compute the length of AB, we use Cos B.
⇒
Hence, the length of the side AB = sh
Now, we are asked to compute Sin C - Cos C.
⇒
= s
Sin C = s
⇒ Cos C =
Therefore, Cos C = r
So, Sin C - Cos C = s - r, which is OPTION C and is the right answer.
Answer: isosceles
Step-by-step explanation:
By the alternate interior angles theorem,
Since angles in a triangle add to 180 degrees,
Since sides opposite equal angles in a triangle are equal, .
So, triangle ABC is <u>isosceles</u>