Math, asked by parinitayadav202, 5 months ago

the value of tan70°.tan20°.tan90°

Answers

Answered by aswin6859

3

Answer :. 1

Explanation:. tan70' × tan20' × tan90'

= cot(90' - 70') × tan20' × 1

= cot20' × tan20'

= cos20'/sin20' × sin20'/cos20'

= 1 × 1

= 1

Answered by spal00798

0

Answer: 1

Step-by-step explanation:

tan70' × tan20' × tan90'

= cot(90' - 70') × tan20' × 1

= cot20' × tan20'

= cos20'/sin20' × sin20'/cos20'

= 1 × 1

= 1

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