Question

prove the following:
Cos 10º - Sin 10°/
Cos 10° + Sin 10=
Cot 55°​

Answer 1

Step-by-step explanation:

cos10-sin10/cos10+sin10

divide numerator and denominator by cos10

1-tan10/ 1+ tan10

(tan(45-x)=1-tanx / 1+tanx)

tan(45-10)

tan35

(now convert it into cot by subtracting angle by 90)

cot(90-35)

cot 55