Question

tan20ºtan50ºtan45ºtan70ºtan40º=​

Answer 1

Answer:

1

Step-by-step explanation:

tan20°tan70°tan50°tan40°tan45°

tan(90°-70°)tan70°tan(90°-40°) tan40°tan45°

(the value of tan45°=1)

cot70°tan70°cot40°tan40°×1

(cot thetha=1/tan thetha)

1/tan70°×tan70°×1/tan40°×tan40°×1

= 1 answer