Question

angle where tan is -1? PLEASE HELP! exams tomorrow. Thankyou!

Answer 1

tan is +ve in which quadrants?

Answer 2

@ienarancillo

Answer 3

what? i dont understand you. tan is positive in the 3rd quadrant btw.

Answer 4

and also in 1st quadrant

Answer 5

so tan is -ve in 2 and 4 quadrant

now we know tan45=1

in 2 quadrant,
tan (180-45)=-1

in 4 quadrant
tan(270+45)=-1

Answer 6

yeah. I get it now. its 315 deg and 135 deg? is it right? :)

Answer 7

@hartnn i replied to ur message. :)

Answer 8

yup, both the answers are correct, here also

Answer 9

thankyou so much @shubham.bagrecha @hartnn @myko :D