Respuesta :
Answer:
this is asking you if you remember that angle in radians gives sin(Ф)= 1/2 so do you remember or no?
Step-by-step explanation:
best table in the world to help remember.. you'll need this table just remember it
Radians 0 π/6 π/4 π/3 π/2
Degrees 0 30 45 60 90
Sin 0 √1/2 √2/2 √3/2 √4/2
Cos 1 √3/2 √2/2 √1/2 0
notice that the numerators just count up from 0 :o and only the numerator is under the square root sign, not the denominator. it's always just 2
ofc √4/2 is just 1... but it's just easy to remember the table by writting it in that form :) 0, 1, 2, 3 ,4 easy as pie.. pun intended
Also the √1/2 is also just 1/2 but, again .. it's just easy to remember the table that way.
soooo sin(Ф)= 1/2 is the angle of 30 degrees.. huh sooo what would make 30 in that formula ? 2*25 = 50 and then take away 20 makes 30 yay we have what x is... it's 25.. nice but there is one more part to take care of.. they ask for the answer to be between pi and 2 pi which 30 degrees is not... but.. we can use that 30 degrees and just add 180 to find the opposite angle that would also be = to 1/2 we want our angle to be 210 that is 180+30 soooo to get 210 from our formula take 230 minus 20 to get to 210 and then take the 230 and divide that by two... to get 115... yay for our X we need 115
that's our final answer 115=x
