What's the question????
Distance from building = 80/tan(50) = about 62.13 m
Distance to half the elevation angle = 80 / tan(40) = 95.34 m
So.....he should walk 95.34 - 62.13 = 33.21 m farther away from the building
Oops....thanks, guest, for catching my mistake.....I've corrected my answer.....!!!
There are 80 students in total
fraction choosing A = 35/80 = 7/16
% choosing C = 22/80 = 11/40 = 27.5%
[edited answer ]
Thanks, guest.....that second interpretation didn't cross my mind.......oh, well......the questioner now has two options available.....!!!!!
(sinx + 1)^2 - 2sinx = 0
sin^2x + 2sinx + 1 - 2sinx = 0
sin^2x + 1 = 0
sin^2x = -1
Notice that the square of any non-zero value of the sine is always positive.....so.......this has no real solution(s).....!!!!!
A) The first term is just 3(1) + 7 = 3 + 7 = 10
B) 3n + 7 = 49 subtract 7 from both sides
3n = 42 divide both sides by 3
n = 14 [ 49 is the 14th term]
Can you figure out the last two ?? 118 ...... and I think "39' should be "37"
8 + (1/2)n = 14 multiply everything by 2
16 + n = 28 subtract 16 from both sides
n = 12
Check answer
8 + (1/2)*12 = 14
8 + 6 = 14
14 = 14
If you know the circumference.......the radius, r, can be found by :
[Circumference] / [2 x pi] = r ( for pi, you can use ≈ 3.14 )
If this is
2sin2x + sinx = 0
2*2sinxcosx + sinx = 0
4sinxconx + sinx = 0 factor out sinx
sinx ( 4cosx + 1) = 0
Then either
sin x = 0 and this happpens at 180°
Or
4cosx + 1 = 0
cosx = -1/4 and this happens at about 104.48° and at about 252.52 °
Here's the graph.......https://www.desmos.com/calculator/xr4vh9ar1d
