Suppose cos(A) = -0.3. Use the trig identity sinº (A) + cos” (A) - 1 to find sin(A) in quadrant II. Round to ten-thousandth. 0.9154
-0.9348
-0.9276
0.9539

25.2

step-by-step explanation:

2+4x6-8/10= 25.2

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)

4

step-by-step explanation:

im pretty sure it's 4 beacsue 8/2 equals 4