am i correct??
sin^2 60° + cos^2 30° = _____

1/2
3/4
1
1 1/2

Question

am i correct??
sin^2 60° + cos^2 30° = _____


1/2
3/4 
1
1 1/2 <<??

anonymous · Answer

sin 60 = cos 30 = $$\frac{ \sqrt{3} }{ 2 } $$

anonymous · Answer

Can you do the rest?

ttop0816 · Answer

no ): mind helping me out?

anonymous · Answer

OK 
$${(\frac{ \sqrt{3} }{ 2 })}^2=\frac{ \sqrt{3}^2 }{ 2^2 }=\frac{ 3 }{ 4 }$$

anonymous · Answer

sin^2 60° + cos^2 30° =3/4 +3/4=6/4=3/2

ttop0816 · Answer

ohhh then the answer would equal to 3/4!

anonymous · Answer

is 3/4=3/2 ?

ttop0816 · Answer

ohhh sorry nvm 1 1/2!

anonymous · Answer

Yes that is it, I hate that notation. It always confused me. 
However it is true 1 1/2=3/2

ttop0816 · Answer

thank you!! @Andras oh and do you know if this is correct also??
Convert 28.7251° to degrees, minutes, and seconds. Round to the nearest second.

i got 
28 degrees 43' 30.36''?? 
and how would i round it to the nearest second??

anonymous · Answer

Here is your cheat: http://www.satsig.net/degrees-minutes-seconds-calculator.htm :)

anonymous · Answer

$$\sin ^2(60 {}^{\circ})+\cos ^2(30 {}^{\circ}) $$$$\left(\frac{\sqrt{3}}{2}\right)^2+\left(\frac{\sqrt{3}}{2}\right)^2 $$$$\frac{3}{4}+\frac{3}{4}=\frac{3}{2} $$