Prove : (cosecA - sinA) / (cosecA + sinA) = (sec²A - tan²A) / (sec²A + tan²A)

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(cosecA - sinA) / (cosecA + sinA) = (sec²A - tan²A) / (sec²A + tan²A)
coseca-sina/coseca+sina = sec^2a-tan^2a/sec^2a+tan^2a
cosecA- sinA/cosecA+ sinA = sec2A - tan2A/sec2A + tan2A.
prove cosecA-sinA / cosecA+sinA=sec^2A-tan^2A / sec^2A+tan^2A
#math #trigonometry
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