475 32 1680 480 32 25 110 340
<span>3×800+32000:40+400×4=
1)</span><span>3×800=2400
2)</span><span>32000:40= 800
3)400</span><span>×4=1600
4)2400+800=3200
5)3200+1600=4800</span>
Cos⁴a + sin²acos²a = cos⁴a + ( 1 - cos²a ) * cos²a = cos⁴a + cos²a - cos⁴a = = cos²a
У+200=419+190
у+200=609
у=609-200
у=409
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