8(cos(arcsin(1/4))²-sin(arcsin(1/4))² =
8 (1-(1/4)²-(1/4)²) = 8(1-2(1/4)²)= 8(1-2(1/16)= 8(1-1/8)=8×7/8=7
Ответ: 7.
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8(cos(arcsin(1/4))²-sin(arcsin(1/4))² =
8 (1-(1/4)²-(1/4)²) = 8(1-2(1/4)²)= 8(1-2(1/16)= 8(1-1/8)=8×7/8=7
Ответ: 7.