Y=0.72(3) i think tht is the answer
Answer: 2sin^2x+sin2x+cos2x=0 ..... (1).
By using the trigonometric identities below :
sin2x=2sinxcosx
cos2x=cos^2x-sin^2x
We substitute the trigonometric identities into (1).
2sin^2x+2sinxcosx+cos^2x-sin^2x=0
By combining like terms .
sin^2x+2sinxcosx+cos^2x=0.....(2)
The equation (2) is equivalent to the following expression (3).
(sinx+cosx)(sinx+cosx)=0 .....(3).
sinx+cosx=0
cosx=-sinx
divide both sides by cosx
1=-sinx/cosx
-1=sinx/cosx
sinx/cosx=tanx
substitute
-1=tanx
tanx=-1
tangent is negative in 2nd and 4th quadrants
tan135º=-1 (one answer)
tan315º=-1 (second answer)
Step-by-step explanation:
Please refer to the trigonometric identities used and explained above .
1 U.S. CUP - 0.0625 U.S. GALLONS
So? Convert the cups to gallons.
7 DAYS/PER WEEK
1.5 x 7 = 10.5
So... half a cup is about 0.03125 gallons.
0.03125 + (10 x 0.0625) = ???
Drum roll please...
Plot twist: You can do it yourself.
:P
The answer to the question would be B which is 169.91 dollars
