Question

tan35/cot55+cot78/tan12 -1 evaluate​

Answer 1

Answer:

1

Step-by-step explanation:

tan35/cot55+cot78/tan12 -1

tan35/tan(90-55)+cot78/cot(90-12)-1

tan35/tan35+cot78/cot78-1

1+1-1

1

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Answer 2

Answer:

1

Step-by-step explanation:

tanФ=cot(90°-Ф)    cotФ=tan(90-Ф)

⇒cot(90°-35°)/cot55° +tan(90°-78°)/tan12°-1

⇒cot55°/cot55°+tan12°/tan12°-1

⇒1+1-1

⇒2-1

⇒1

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