cotx+cosecx-1/cotx-cosec+1=1+cosx/sinx
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1+ cot x + cosec x
= cot x + cosec x + 1
= cot x + cosec x + (cosec ^2 x - cot ^2 x)
= (cot x + cosec x)(1+ cot x + cosec x)
so
(1+ cot x + cosec x)/1+ cot x + cosec x)
= cot x + cosec x = cos x/ sin x + 1/sin x = (1+ cos x)/ sin x
= cot x + cosec x + 1
= cot x + cosec x + (cosec ^2 x - cot ^2 x)
= (cot x + cosec x)(1+ cot x + cosec x)
so
(1+ cot x + cosec x)/1+ cot x + cosec x)
= cot x + cosec x = cos x/ sin x + 1/sin x = (1+ cos x)/ sin x
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