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Question Number 118280 by hmh2k20 last updated on 16/Oct/20
(26)OA→=a→=(4.83.6),OB→=b→=(815)a→.b→=(4.8)(8)+(3.6)(15)=92.4→a=4.82+3.62=23.04+12.96=36=6b=82+152=64+225=289=17a.b=6.17=102cosAOB=a→.b→a.b=92.4102=0.9059=cos25.06°∴∠AOB=25.06°
Commented by Ar Brandon last updated on 16/Oct/20
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