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Can someone please please please help? I'm so confused. I've been on this problem for an hour.

Can someone please please please help? I'm so confused. I've been on this problem for an hour.
83.0k views
1 vote
Can someone please please please help? I'm so confused. I've been on this problem for an hour.

Can someone please please please help? I'm so confused. I've been on this problem-example-1
User Ptk
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1 Answer

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\cos(A-B)=\cos A\cdot\cos B+\sin A\cdot\sin B=(35)/(37)\cdot(21)/(29)+(12)/(37)\cdot(20)/(29)=\\\\\\=(735)/(1073)+(240)/(1073)=(975)/(1073)\approx0.91
User Roperzh
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