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vetalmoroz
@vetalmoroz
March 2022
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Sin 36(градусов) + sin 40 + cos 62 + cos 42/ 4 cos 6 cos 4 sin 38
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sedinalana
Verified answer
(2sin38cos2+2cos52cos10)/4cos6cos4sin38=
=(2sin38cos2+2sin38cos10)/4cos6cos4sin38=
=2sin38(cos2+cos10)/cos6cos4sin38=(cos2+cos10)/2cos6cos4)=
=2cos6cos4/2cos6cos4=1
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Verified answer
(2sin38cos2+2cos52cos10)/4cos6cos4sin38==(2sin38cos2+2sin38cos10)/4cos6cos4sin38=
=2sin38(cos2+cos10)/cos6cos4sin38=(cos2+cos10)/2cos6cos4)=
=2cos6cos4/2cos6cos4=1