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
Answer: He jogs 12 miles per hour
Step-by-step explanation: Every 15 minutes he jogs 3 miles, there are 60 minutes in an hour, 60/15 = 4, 4 x 3 = 12
Answer: 40
Step-by-step explanation:
5/3 24/?
divided by 8 =24 divided by 8 =3
5 x 8 =40
Hope this helps :)
Answer:
Xbox One is the better console to buy.
Adding the game console for $150.00 with 7 games costing 24, they will cost you $318.00
While the PlayStation 4 with the 7 games cost a total of $320.00
Step-by-step explanation:
Answer: xp=py
<xpa=<apy
4 right angles are formed
2(xp)=xy
<xpa and <apy are supplements.
Step-by-step explanation:
