tan-1(tan 5pi/4) Share with your friends Share 5 Lalit Mehra answered this Dear Student!We know that,Range of tan-1x = Cheers! -1 View Full Answer Kaushal Kishore Tiwari answered this Is it not 5pi/4. -2 Nikitha Sreekumar answered this 5pi/4 5 Abhishek answered this THANK YOU sir. 1 . . answered this IT IS pie /4.+ ..... because tan(PIE+THETHA) IS TAN THETHA ONLY .WITH + SIGN. 7