Question

prove that :
(1+cot55)(1+cot80)(1+cot77)(1+cot58)=4​

Answer 1

Answer:

cot(55°) = 0.70021 ... cot(58°) = 0.62487 ... cot(77°) = 0.23087 ... cot(80°) = 0.17633

(1+cot55)(1+cot80)(1+cot77)(1+cot58)

Answer 2

Answer:

(sin/cos)(sin/cos)(sin/cos)(sin/cos)=4