Question

tan 10. tan 20. tan30.tan40.tan50.tan60.tan70.tan80
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Answer 1

Answer:

Step-by-step explanation:

Tan 10 * tan 20 * tan30 * tan40 * tan 50 * tan 60 * tan70 * tan80

 

tan 10 * tan 20 * tan30 * tan 40 * tan(90-40) * tan (90-30) * tan (90-20)* tan (90-10)

tan 10 * tan 20 * tan 30 * tan 40 * cot 40 * cot 30* cot 20 * cot 10

 

Hence all cancels out and  

Answer is 1.

Answer 2

1

Step-by-step explanation:

with trigonometric ratios