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In an acute angled DeltaABC , if tan (A+...

In an acute angled `DeltaABC` , if tan (A+B-C) = 1 and sec (B+C-A)=2 , then find the value of cos (4B-3A) .

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To solve the problem step by step, we will start with the given equations and manipulate them to find the required value of \( \cos(4B - 3A) \). ### Step 1: Analyze the first equation We have: \[ \tan(A + B - C) = 1 \] This implies: ...
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