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general formula h=height b1=bottom base length b2=top base length A = (1/2)*h*(b1+b2)
so I don't need to worry about the side length and degree that they gave me?
for area no as long as you have all the other information you need
I don't have the height but have a side length
set up right triangle by drawing line straight down from where side meets top
which angle did they give you, top or bottom?
they gave me bottom so instead of hte right angle being 90 it's 65 then the angle opposite is 90 and top is 25 the hypotenuse is 14in
ok to find height you have use trig sin65 =opposite/hypotenuse = h/14 h = 14*sin65
which is about 12.7 now I just plug it in
A=.5(12.7(12+25)) A= about 235
wait lol my teacher showed me how to do this next one but I forgot it
tanx=-1 given that 0 degrees is less than or equal to x which is less than or equal to 360 degrees
tanx = sinx/cosx tanx = -1 so sinx/cosx = -1 multiply cosx on both sides sinx = -cosx for what x on unit circle is sin opposite of cos
we are solving for x
thats what i am assuming
do you have a unit circle?
this is for w/out calculator if you are allowed to use calculator you could enter arctan(-1)
I'm using a TI-83 a way old version of graphing calcs
and no unit circle
haha hey thats what i use ok what do you get when you enter arctan(-1)
and exactly how am I supposed to enter arctan(-1)? lol
theres a tan^-1 above the tan button
the inverse of tan is = arctan(-1)?
yes sorry inverse tan is also called arctan
good but 0
is there no value?
neg angle just refers to direction 315 degrees in positive direction is same as 45 degrees in negative direction think of a circle
ok got it thanks:)
i see you