This is trigo sum
Prove that
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Answer: hope this answers your question
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Answer:
cotA+cosecA-1/cotA-cosecA+1=
convert into sin and cos ratios
(cosA+1-sinA)/(cosA+sinA-1)
multiply (cosA+sinA+1) both numerator and denominator
(1+cosA)^2-sin^2A/2sinAcosA
2cosA+2/2sinA
cot A + cosec A
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