Resposta: f ^ (- 1) (x) = (1/2) x-1/2
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:
Hi there!
Your answer is:
0+ 10i!
I takes away the negative. √100 is equal to 10
Answer:
D. 1,000
Step-by-step explanation:
Given:
Three fractions:
1) 2/5
2) -3/7
3) 2/3
The least is -3/7 because of the negative sign. Second is 2/5, and the greatest is 2/3.
-3/7 is -0.43 in decimal form
2/5 is 0.40 in decimal form
2/3 is 0.67 in decimal form
My answer is:
<span>B. − 3 over 7 comma text end text 2 over 5 comma text end text 2 over 3</span>
