Answer:
a
Step-by-step explanation:
Answer:
11 79/80
Step-by-step explanation:
2+4+3+ 3/4+4/5+8/9
=9+ 3(5*9) +4(4*9) + 8(5*4)/4*5*9
=9 + 135+ 144+160/180
=9+ 439/180
=9+2 + 79/80
=11 79/80
5' per side or whatever units it's measured in, because 4x5=20
9514 1404 393
Answer:
-2cos²(x) +3cos(x) -1
Step-by-step explanation:
Use the "Pythagorean identity" to replace sin²(x).
sin²(x) +cos²(x) = 1
Then ...
2sin²(x) +3cos(x) -3 = 2(1 -cos²(x)) +3cos(x) -3
= -2cos²(x) +3cos(x) -1