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AgentFBR007
@AgentFBR007
August 2021
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Помогите пожалуйста!!!!
Упростить: а) sina*sinb-cosa*cosb
б) sin12°*cos53°-sin53°*cos12°
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Dимасuk
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А) sinA•sinB - cosA•cosB = -(cosA•cosB - sinA•sinB) = -cos(A + B)
б) sin12°•cos53° - sin53°•cos12° = sin(12° - 53°) = sin(-41°) = -sin41°.
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Answers & Comments
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А) sinA•sinB - cosA•cosB = -(cosA•cosB - sinA•sinB) = -cos(A + B)б) sin12°•cos53° - sin53°•cos12° = sin(12° - 53°) = sin(-41°) = -sin41°.