Use cosine law to solve the problem. See image attached.
What we're looking for is the length of side A (a side which is opposite with angle A).
This is the formula of cosine law
A² = B² + C² - 2BC cos A
Input the numbers
A² = 75² + 90² - 2(75)(90) cos 85°
A =
A =
Answer:
Step-by-step explanation:
780
X is 3
y is 2
you have to replace x with a zero and divide 12 by it and then you do the same for y
Answer:
x=-3
x=-5
Step-by-step explanation: