Question

answer if u know with explanation​

Answer 1

Answer:

Explanation:

Vbhjj

Answer 2

Answer:

tan100°= tan(90°+10°)=-cot10°

tan70°=tan(90°-20°)=cot20°

cot20°=cot(10°+10°)

So,

cot10°= cot10°cot10°-1/cot10°+cot10°

=cot^2(10)°-1/2cot10

=-cot10°+2(cot^2(10)°-1/2cot10°)

=-cot10°+cot^2(10)°/cot10°-1/cot10°

=-tan10°

HOPE THIS HELPS...