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

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 equal to the length of the segment AB; but when alpha becomes 90^@ the length of AB get stretched upwards (or downwards for alpha=270^@) so that we will never meet A!!! Hope it helps!

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 things easier to understand, we will use a radius of 1, meaning the height (y) is also 1. The point will be (0, 1). tan90^@=y/x tan90^@=1/0 tan90^@=undefined tan90^@ is undefined because …

2018年3月7日 · How do you tell whether the value of tan 90 degrees is positive, negative, zero or undefined? Trigonometry Right Triangles Relating Trigonometric Functions 1 Answer

2016年7月17日 · How do you prove tan(90°+a)=-cot(a)? Trigonometry Trigonometric Identities and Equations Fundamental ...

2015年9月21日 · Using a unit circle (so the hypotenuse #=1#) and its intersection with an angular arm in standard position:. the six basic trigonometric functions are defined as

2015年10月20日 · #tan(90^@)# is undefined. Explanation: By definition, using a reference triangle with hypotenuse of unit ...

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

2013年11月12日 · Is tan(x + 90) = -cot(x) ? \tan(90^\circ) is not defined. That is why you were told to use the sum of angles formulas for sine and cosine, not the sum of angles formula for tangent.

Following table gives the double angle identities which can be used while solving the equations.. You can also have #sin 2theta, cos 2theta# expressed in terms of #tan theta # as under.