2 years ago

In a triangle ABC, tan (a) = 20/21. Find sin (a) and cos (a)

Mathematics

1 answer:

sesenic [268]2 years ago

6 0

Answer:

sin(a)=20/29

cos(a)=21/29

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2 years ago

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slamgirl [31]

The slope-intercept equation is y=mx+b.

The slope formula is $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

Our three points are (5,5), (-5,-7) and (0,-1)

Using our slope formula our slope becomes $\frac{-7-5}{-5-5} =\frac{12}{10} =\frac{6}{5}$

Then, if we use one of our points (pick whichever you want, although (0,1) is the easiest) to solve the equation. So, $y=\frac{6}{5}x-1$ . When we solve for x and y, we get -1=0+b, or b=-1.