Question

2.
tan 10°tan 15°tan 75º tan 80° = ?​

Answer 1

Answer:

1

Step-by-step explanation:

tan10° tan15°tan(90 -15)° tan(90-10)°

tan 10° tan15° cot15°cot10°

tan10°cot10° tan15°cot15°

1 × 1. (tan A × cot A = 1)

Ans. - 1.

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Answer 2

Answer:

tan10 tan15 tan(90-75)

tan(90-80)=tan10

tan15 cot10 as we know tan that's not theta=1

so

tan10 cat10 tah15 cat15=1