Question

the principal solution of tan theta=1 is​

Answer 1

Answer:

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Step-by-step explanation:

tanx=−1

Here, tan is negative.

We know, tan is negative in 2nd and 4th quadrant.

Here, θ=45o

Value in 2nd quadrant = 180o−45o=135o

Value in 4th quadrant = 360o−45o=315o

So, principal solutions are

x=135o=43π and x=315o=47π.