Math, asked by jyotish12, 5 hours ago

answer this fast

FIND THE PRINCIPAL VALUES

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Answered by sejalrathee123

3

Answer:

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let y = tan^-1(-1)

tan y = 1

tan y = tan(-π/4)

range of principal value of tan^-1 is

(-π/2 to π/2)

so principal value of tan^-1(-1) is -π/4

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