Answer:The answer is 12
Step-by-step explanation:
I cheated
Important notes:
3 sides 1 angle - COSINE RULE
2 sides 2 angle - SINE RULE
since, the question wants to find the length of BC. In the end we will have 3 sides and 1 angle and use cosine rule
formula of cosine rule:
a² = b² + c² - 2bc Cos A° (to find the length)
Cos A° = b² + c² - a² / 2bc ( to find the angle, if there is given three sides and have to find the angle)
So just substitute,
a² = 13² + 15² - 2(13)(15) Cos 95°
a = 20.6 or 21
9/200. divide 45 and 1000 both by 5 to reduce it.
Answer:
1 and 2
Step-by-step explanation:
Answer:
Answer: 55
Step-by-step explanation:
