![MilesDown Card Help - Is the force of friction supposed to be cosine or sine? The answer states cosine below, but the image of the box on an incline plane shows sine MilesDown Card Help - Is the force of friction supposed to be cosine or sine? The answer states cosine below, but the image of the box on an incline plane shows sine](https://i.redd.it/1tcvc18ieuk61.jpg)
MilesDown Card Help - Is the force of friction supposed to be cosine or sine? The answer states cosine below, but the image of the box on an incline plane shows sine
![Elements of plane and spherical trigonometry . , and esc negative,and tan and cot positive. In the fourth quadrant x is positive and y is negative.Hence in this quadrant the negative Elements of plane and spherical trigonometry . , and esc negative,and tan and cot positive. In the fourth quadrant x is positive and y is negative.Hence in this quadrant the negative](https://c1.alamy.com/thumbs/2ce0jn1/elements-of-plane-and-spherical-trigonometry-and-esc-negativeand-tan-and-cot-positive-in-the-fourth-quadrant-x-is-positive-and-y-is-negativehence-in-this-quadrant-the-negative-functions-will-be-sin-tancot-and-esc-and-the-positive-ones-will-be-cos-and-sec-these-results-are-summarized-in-the-following-table-this-and-the-three-following-formulas-are-numbered-to-correspondwith-thosein-17-with-which-they-are-identical-the-trigonometric-functions-31-angle-=-0-j0-90-180-180-270-270-360-sin-cos-tan-cot-sec-csc-2ce0jn1.jpg)
Elements of plane and spherical trigonometry . , and esc negative,and tan and cot positive. In the fourth quadrant x is positive and y is negative.Hence in this quadrant the negative
![Sin(90-A), Sin(90+A), Cos(180-A), Cos(180+A), Sin(270-A), Sin(270+A),Cos(360-A) How Why Trigonometry - YouTube Sin(90-A), Sin(90+A), Cos(180-A), Cos(180+A), Sin(270-A), Sin(270+A),Cos(360-A) How Why Trigonometry - YouTube](https://i.ytimg.com/vi/Cu0yrPf2660/hqdefault.jpg)