2018年4月13日 · tan 90 = oo tan 90 = sin 90 / cos 90 = 1 / 0 = oo

2015年11月27日 · tan90^@ is undefined. Since the angle is 90^@, there will be a unit circle instead of a special triangle. Any point at 90^@ can be described as (0, y). However, to make …

2018年3月7日 · How do you tell whether the value of tan 90 degrees is positive, negative, zero or undefined?

2016年7月17日 · We know that tan (90+a)=sin (90+a)/ (cos (90+a))= [sin90*cosa+cos90*sina]/ [cos90*cosa-sin90*sina]= [cosa]/ [-sina]=-cota Note sin90=1 , cos90=0

2015年10月15日 · This is a good question indeed! I'll try to give you a visual explanation. Consider the trigonometric meaning of tangent of an angle alpha: The tangent of alpha is …

2015年9月21日 · sin (90^@)=1color (white) ("XXXXXXXXX")csc (90^@)=1 cos (90^@)=0color (white) ("XXXXXXXXX")sec (90^@) " is undefined" tan (90^@) " is undefined"color (white) …

2015年10月20日 · By definition, using a reference triangle with hypotenuse of unit length, XXXtan(θ) = length of opposite side length of adjacent side As θ → 90∘ XXXlength of opposite …

2018年5月8日 · LHS=tan (90^@− A) sec (180^@+ A) cos (90^@+ A) =cotA (- secA) (- sin A) =cosA/sinA*1/cosA*sin A =1

The functions sine, cosine and tangent of an angle are sometimes referred to as the primary or basic trigonometric functions. The remaining trigonometric functions secant (sec), cosecant …

2015年7月11日 · Recall that cot(θ) = 1 tan(θ) and that tan(θ) = sin(θ) cos(θ) So, cot(θ) = 1 tan(θ) = 1 sin(θ) cos(θ) = cos(θ) sin(θ) Now, let's just put in 90 degrees for θ cot(θ) = cos(θ) sin(θ) …