Prove that
(1+tan62)(1+cot67)(1+tan13)(1+cot68)=4
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(1+tan 62)(1+tan23)(1+tan13)(1+tan22)=4
(2) (2) =4
4=4
(2) (2) =4
4=4
Answered by
0
(1+tan 62)(1+tan23)(1+tan13)(1+tan22)=4
(2) (2) =4
4=4
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