Solutions
To solve the given equation lets use double-angle theorem. Double-angle formulas allow the expression of trigonometric functions of angles equal to 2α<span> in terms of </span>α<span>, which can simplify the functions and make it easier to perform more complex calculations, such as integration, on them.
</span>cos(3t)=cos^3(t)-3sin^2(t)cos(t)
cos(A+B) = cosAcosB - sinAsinB
<span>Now cos(3t) = cos(2t+t) </span>
⇒<span>cos(2t)cos(t) - sin(2t)sin(t) </span>
⇒<span>(2cos^2(t)-1)cos(t) - 2sin(t)cos(t)sin(t) </span>
⇒<span> 2cos^(3)t - cos(t) - 2sin^2(t)cos(t) </span>
⇒<span> 2cos^3(t) - cos(t) - 2(1-cos^2(t))cos(t) </span>
⇒<span>2cos^3(t) - cos(t) - 2cos(t) + 2cos^3(t) </span>
⇒4cos^3(t) - 3cos(t)
1/6 :3 I believe Plz tell me if it is correct
144=(x+7)^2 take the square root of both sides...
12=x+7 subtract 7 from both sides...
x=5
So the original was a 5m square.
...
255=WL and you are told that W=L+2 so the equation becomes:
255=(L+2)L
255=L^2+2L
L^2+2L-255=0
L^2+17L-15L-255=0
L(L+17)-15(L+17)=0
(L-15)(L+17)=0 Since L>0...
L=15yd, and since W=L+2, W=17yd so
length=15, width=17yd
Answer: G
Step-by-step explanation:
Its g because its on the same side of the cube
