24. tani 100' + tan 125'+ tan 100', tan 125' is eapeal to

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( tan left(100^{circ}+125^{circ}right)=tan 225^{circ} ) ( begin{aligned} a operatorname{ls} 0, & tan 225^{circ} tan left(180^{circ}+45^{circ}right) &=tan 45^{circ} &=1 end{aligned} ) ( cos frac{tan left(00^{circ}+tan 125^{circ}right)}{cos 100^{circ} tan 128^{circ}}=1 ) ( tan 100^{circ}+tan 125^{circ}+tan 100^{circ} tan 125^{circ}=1 )

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