what values of tangent are undefined
90 degrees and 270 degrees
90 and 270 degrees are completely vertical, so the tangent is undefined
Tangent is the raport of sin/cos think where cos is 0 you got undefined value for tangent so basicly find the angles where cos is 0;
\[\frac{\pm( 2n-1)\pi }{ 2 }\] where n is a set of real numbers
^that's the possible value of angles with tanx = undefined
which trig function(s) are positive in both quadrants I and III
@berryberryarey none of the usual ones(sin,cos,tan,cotan)
so should just say sin, cos, tan, and cotan? @Alexander95
sorry @berryberryarey tan is positive in both quadrant I and III
my bad so the final answer is tan
so theres no postive functions in quad i ans III @Alexander95
The only trig function which is positive in quadrant I and III is tan!
ok . if the sin of angle is 0, then the cotangent is also 0 is that true or false
If the sin of angle is 0 then cotan doesn't exist
so it's false
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