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Step-by-step explanation:
If cos A=1/2 then,
A=60° [cosA=cos60°]
similarly B= 45°
tanA- tanB/1+tanA tanB
By putting the value of A and B then,
tan 60°- tan45°/1+tan60°*tan 45°
√3-1/1+√3×1
√3-1/1+√3
√3-1×1-√3/1+√3×1-√3 [ multiplying both by
√3-3-1+√3/(1-√3 )² 1-√3] 2√3-4/1+3-2√3
2(√3-2)/4-2√3
2(√3-2)/2(2-√3)
√3-2/2-√3
-(√3-2)/√3-2)
= -1
Hopefully it's helpful
Please mark it brainilest
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