Which formula can be used to find the show angle of the resultant vector? a)sin∅=ry/rx, b)tan∅=rx/ry, c)tan∅=ry/rx, d)sin∅=rx/ry

Option (c)

Explanation:

There are six trigonometric ratios.

Sin theta, Cos theta, tan theta, cot theta, sec theta and cosec theta.

In a right angled triangle

Sin theta = perpendicular/hypotenuse

Cos theta= base / hypotenuse

Tan theta = perpendicular/ base

Cot theta = base/ perpendicular

Sec theta = hypotenuse/ base

Cosec theta= hypotenuse/ perpendicular

So, tan theta = Ry / Rx

the given statement is true.

sensory memory lasts for a fraction of seconds before the information is lost. it is the shortest -term memory and can be called as an element of memory. example: when we look at something and remember what it looks like, is just a second of observation. it degrades very quickly. it can also be considered as the process of perception rather than considering it as a memory.