Question Number 22268 by Sanjay Deore last updated on 14/Oct/17
$$\mathrm{if}\:\mathrm{tanx}\:=\:\frac{\mathrm{1}}{\mathrm{3}}\:\mathrm{or}\:\mathrm{other}\:\left(\mathrm{except}\:\mathrm{standard}\:\right. \\ $$$$\left.\mathrm{values}\right)\:\mathrm{how}\:\mathrm{to}\:\mathrm{find}\:\mathrm{x} \\ $$
Commented by $@ty@m last updated on 14/Oct/17
$${using}\:{trigonometric}\:{tables} \\ $$
Commented by ajfour last updated on 14/Oct/17
$${using}\:{scale}\:{and}\:{protractor}\:. \\ $$
Answered by squidward last updated on 14/Oct/17
$${tanx}={a} \\ $$$${x}={tan}^{−\mathrm{1}} \left({a}\right)={arctan}\left({a}\right) \\ $$$${then}\:{use}\:{calculator},\:{if}\:{you}\:{want}\:{to}\:{know} \\ $$$${how}\:{to}\:{calculate}\:{x}\:{without}\:{calculator} \\ $$$${let}\:{me}\:{know} \\ $$