Ответы на вопрос:
Sin10sin30sin50sin70=cos10sin10sin30sin50sin70/cos10==1/2sin20sin70sin30sin50/cos10=1/4sin40sin50sin30/cos10==1/8sin80sin30/cos10=1/8cos10sin30/cos10==1/8sin30=1/8*1/2=1/16=0.0625илиsin10sin30sin50sin70=1/2sin10sin50sin70==1/4(cos40-cos60 )sin70=1/4(cos40-0.5)sin70==1/4cos40sin70-1/8sin70=1/8(sin110+sin30)-1/8sin70==1/8sin110+1/16-1/8sin70=1/8sin(180-70)+1/16-1/8sin70==1/8sin70+1/16-1/8sin70=1/16=0.0625
Logₓ 2+log ₓ 8=4 (x> 0, x≠1) logₓ 16=4x⁴ = 16 x = 2 logₓ 8-log ₓ 2=2 (x> 0, x≠1) logₓ4 = 2 x²= 4 x = 2logₓ3+logₓ 9=3 (x> 0, x≠1) logₓ27 = 3 x³ = 27 x = 3
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