Question

(Cot A-1)2+(cot A+1)2=2cosec2a

Answer 1

Answer:

answer is 0

hope it helps you

Answer 2

Step-by-step explanation:

(cotA-1)^2+(cotA+1)^2

expanding the brackets

cotA^2 +1 - 2cotA + cotA^2 +1+ 2cotA

2(cotA^2+1)

2cosecA^2........(cosecA^2-cotA^2=1)

HENCE PROVED

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