Question

tan20+tan40+tan60+tan80+tan100 = ??
with explanation ​

Answer 1

I think there should not be any positive sign.

If it contains multiply sign between each term..then,

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

Answer 2

Hey Brainly user

Here goes your answer

Tan 20+tan 40 + tan 60 +tan 80 + tan 100

»tan 20 + cot 20 + tan 40 + cot 40

»1+1

=2