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cos^2(20°) + cos^2(52°) + cos^2(38°) + cos^2(70°)

Note  cos (20°)  = sin (70”)

And   cos(52°)  =  sin (38°)

So.....we have

sin^2(70°)  + sin^2(38°)  + cos^2(38°) + cos^2(70°)     rearrange  as

[sin^2 (70°) + cos^2(70°)]  + [ sin^2(38°) + cos^2(38°) ]  =

             1                         +                   1     =                2

Create the equation,( a=p(1+r)^t ) and copy and paste it 

s]78966 # 9- = Error: Unknown Function 'cross'

To test whether we have a right triangle....this must be true.....

18^2  +  25^2   =  33^2    

949   =  1089   ????    ....... no......not a right triangle

7 o'clock (pm/am, not specified.)

Put a ^ then the number

If you don't know how, look at the number 6, press shift and 6, then the number

jsut use the X^Y button. Then enter any number you want!

You guyz it obviously 00 durr

cos^2(x) + cos^2(pi - x)= 1

cos^2(x)  +  [ cos (pi)cos (x)  +  sin(pi) sin(x) ] ^2

cos^2(x)  + [ - cos(x) ] ^2 

cos^2(x)  +  cos^2(x) 

2cos^2(x)

This is not an identity  !!!

AM or PM?

Assuming its 11:30 AM, 

Around 7:00 PM?

l tried to use in edit. lt was an endless cycle of "show preview."

1 divided by 14 = 1/14 x 100 = 100/14 or 50/7 or 7+1/7

sin (t) csc(pi/2 - t)  =

sin (t)  /  sin (pi/2 - t)  =

sin (t) / [ sin (pi/2) oos (t)  -  sin(t)cos (pi/2) ]  =

sin (t)  /  [ (1)* cos(t) ]  =

sin (t)  / cos (t) =

tan (t)

Thank you, CPhill! You have once again helped someone in desperate need! I very much appreciate the help!

Thanks

-iiVoidRavenZ

Volume of ice cream   =  (4/3) pi (diameter of ice cream/2)^3   =  (4/3)pi (5/2)^3   → (1)

Volume of cone  = (1/3)pi (diameter of cone/2)^2 (height of cone)  = (1/3)pi (5/2)^2 ( 12) → (2)

Percent of  cone filled by ice cream  =  (1) / (2)   =

[ (4/3)pi (5/2)^3 ]   / [ (1/3)pi (5/2)^2 ( 12) ]  =  

4 (5/2) / 12  =

10/12  =

5/6  =  .8333  = 83.33%  =  83%  (rounded)

So algebra!

First, get the variable (x) on one side of the =

-177=4x+79 (i added the x)

Now get x alone!

-177-79=4x+79-79 (subtract the 79)

that gets -256=4x

divide by 4 

-64=x