Answer:
if this is finish the problem then
"his friends decided to order pizza for lunch. one of his friends said they wanted to eat 5 slices. the other one said he wanted 3 and the last one said they must wanted 7 while little Blake just wanted 2. how many boxes of pizza would Blake have to order."
MY answer: zero because Blake made them pay for their own boxes. they didn't want to at first but then they saw the knife Blake was holding in his hand and decide that if they want to live they must buy their own pizza and give him some or theirs
No, it won't change the outcome.
Answer:
1/sqrt10
Step-by-step explanation:
1) Find out cosA using formula (cosA)^2+(sinA)^2=1
The module of cosA= sqrt (1- (-3/5)^2)= sqrt 16/25=4/5
So cosA=-4/5 or cosA=4/5.
Due to the condition 270degrees< A<360 degrees, 0<cosA<1 that's why cosA=4/5.
2) Find sinA/2 using a formula cosA= 1-2sinA/2*sinA/2 where cosA=4/5.
(sinA/2)^2= 0.1
sinA= sqrt 0.1= 1/ sqrt10 or sinA= - sqrt 0.1= -1/sqrt10
But 270°< A< 360°, then 270/2°<A/2<360/2°
135°<A/2<180°, so sinA/2 must be positive and the only correct answer is
sin A/2= 1/sqrt10
Is the value of u40.9 degrees
