Answer each of the following questions in one word or one sentence or as per exact requirement of the question:

Write the value of .


Given tan-1 {tan (15π/4)}


= tan-1 {tan (4π - π/4)}


We know that tan (2π – θ) = -tan θ


= tan-1 (-tan π/4)


= tan-1 (-1)


= -π/4


tan-1 {tan (15π/4)} = -π/4


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