Question

Evaluate tan5°tan25°tan15°tan85°

Answer 1

Answer:

plz mark me as brainliest

Step-by-step explanation:

Tan 5 = tan(90-85) = cot85

Tan 25 = Tan(90-65) = Cot65

Tan5 Tan25 Tan30 Tan 65 Tan85  

⇒ Cot85 Cot 65 Tan30 Tan65 Tan85

⇒ Tan 30 (Since Cot85*Tan85 = 1 and Cot65*Tan65 = 1)

⇒ $\frac{1}{\sqrt{3} }$

Answer 2

Step-by-step explanation:

wkt tan5=0.887

tan25=0.466

tan15=0.2679

tan85=11.43005

then multiply them

0.887×0.466×0.2679×11.43005=1.2656