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Evaluate tan 35°/cot 55°+cot 78°/tan 12°− 1

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Evaluate  tan 35°/cot 55°+cot 78°/tan 12°− 1
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Best answer
Tan 35° = tan (90°-55°) = cot 55°

Cot 78°= cot (90°-12°) = tan 12°

cot 55°/cot 55°+ tan 12°/tan 12°-1

=1+1-1

=2-1

=1
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Evaluate: tan 35°/ cot 55° + cot 78°/tan 12° - 1
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