Answer:
∠ACD= ∠BAC ( reason: CPCTC)
Answer:
Option C. His answer is not correct, because the same can not be less than either attend
Step-by-step explanation:
we have

we know that



substitute
----> is not true
therefore
His answer is not correct, because the same can not be less than either attend
Answer:
○B. 
Step-by-step explanation:
Trigonometric Identities






<u>Radius Formula</u>

![{[-\sqrt{15}]}^{2} + {[-\sqrt{10}]}^{2} = {r}^{2} → 15 + 10 = {r}^{2} → 25 = {r}^{2}\\ \\ 5 = r](https://tex.z-dn.net/?f=%7B%5B-%5Csqrt%7B15%7D%5D%7D%5E%7B2%7D%20%2B%20%7B%5B-%5Csqrt%7B10%7D%5D%7D%5E%7B2%7D%20%3D%20%7Br%7D%5E%7B2%7D%20%E2%86%92%2015%20%2B%2010%20%3D%20%7Br%7D%5E%7B2%7D%20%E2%86%92%2025%20%3D%20%7Br%7D%5E%7B2%7D%5C%5C%20%5C%5C%205%20%3D%20r)
* Since we are talking about radii, we only want the NON-NEGATIVE root.
In this case, we will not be using the radius in our ratio, according to the trigonometric identity above because we are using the <em>tangent</em><em> </em>ratio:

I am joyous to assist you anytime.
Answer:
(3,-5)
Step-by-step explanation:
We first cal ulate the distance