What are the consinetagent and sine?

Answer 1

Consider a right triangle ABC as shown below. The right angle is at B, meaning angle ABC is 90 degrees. With the editor I have, I am not able to draw the line AC but imagine it to be there. By pythagorean theorem AC*2 = AB*2 + BC*2. The line AC is called the hypotenuse. Consider the angle ACB. The cosine of this angle is BC/AC, the sine is AB/AC and tangent is AB/BC. If you consider the angle BAC, then cosine of this angle is AB/AC, the sine is BC/AC and tangent is BC/AB. In general

sine of an angle = (opposite side)/(hypotenuse)

cosine of an angle = (adjacent side)/(hypotenuse)

tangent of an angle = (opposite side)/(adjacent side)

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B