Let cos (- 80 °) = k, then Tan is 100 °=______ .

Let cos (- 80 °) = k, then Tan is 100 °=______ .

∵ sin80 ° = 1 − cos & nbsp; 280 ° = 1 − cos & nbsp; 2 (− 80 °) = 1 − K2, so tan100 ° = - tan80 ° = - sin80 ° cos80 ° = - sin80 ° cos (− 80 °) = - 1 − k2k
□□△
△○
0
+
——————————
□□△
□□△
△○
0
+
——-—
□□△
0 = how much △ = how much □ = how much
Yes
□□△
△○
0
+
——-—
It can be known that
Δ + Θ + Θ = △ so 0 = 5
□ + △ + 1 = □, so △ = 9
□=8
O = 5 triangle = 7 square = 2
The title is wrong. It should be △
○=5 △= 9 □=8
How many parts is three times ten root sign three times four times ten
3 / 25 root 3
7 / 30 root 3
3 / 25 root 3
Accurate answer: 0.4/lg3;
lg3=0.4771
0.4/0.4771=0.8383
3 / 25 root 3
Triangle + circle + box = 10 triangle + triangle + circle + box = 12
Triangle + circle + box + box = 15
Seek: Triangle = () circle = () box = ()
Triangle 2 box 5 circle 3
2,3,5
Triangle = 2
Circle = 3
Box = 5
How many parts is eight fifteen times three
What is 8 / 15 * 3
8/15x3=8/5
It's eight fifths
That's one and three fifths
I wish you progress in your study, you can ask if you don't understand! Thank you!
8/5.............
5/8
8 / 15 * 3 = 8 / 5
Equal to 24 / 15 = 8 / 5 = 1.6
Circle and square = 72, triangle and square = 58, triangle and circle = 43, find the number of triangle circle and square
I want to know how to calculate, thank you
The sum of the three formulas is as follows:
Circle plus square + triangle plus square + triangle plus circle = 72 + 58 + 43=
Circle + square + triangle =. 4
Subtracting the above three equations from equation 4, we get
The number of circles, squares and triangles,
There is something wrong with the title, isn't it wrong?
Primary school math problems. Circle and square = 72, triangle and square = 58, triangle and circle = 43, find the number of triangle circle and square
Circle + square + triangle = (72 + 58 + 43) / 2 = 86.5
Circle plus square plus triangle - circle plus square = triangle = 86.5-72 = 14.5
Circle + square + triangle - Triangle + square = circle = 86.5-58 = 28.5
Circle + square + triangle - Triangle + circle = square = 86.5-43 = 43.5... Expand
Primary school math problems. Circle and square = 72, triangle and square = 58, triangle and circle = 43, find the number of triangle circle and square
Circle + square + triangle = (72 + 58 + 43) / 2 = 86.5
Circle plus square plus triangle - circle plus square = triangle = 86.5-72 = 14.5
Circle + square + triangle - Triangle + square = circle = 86.5-58 = 28.5
Circle + square + triangle - Triangle + circle = square = 86.5-43 = 43.5 "- fold up
Let x circles, y squares, y triangles and Z series of equations
X+Y=72
Z+Y=58
Z+X=43
68 minutes is a fraction of an hour
Analysis:
Algorithm 1:
Because one hour is 60 minutes
That is 68 △ 60 = 17 / 15 hours
Algorithm 2
60 minutes = 1 hour
8 minutes = 8 / 60 hours = 2 / 15 hours
So 68 minutes = 1 and 2 / 15 hours
If you don't understand, you can continue to ask,
60 minutes = 1 hour
8 minutes = 8 / 60 hours = 2 / 15 hours
So 68 minutes = 1 and 2 / 15 hours
68 / 60 = 17 / 15 hours
60 minutes = 1 hour
68 minutes = 68 / 60 hours = 17 / 15 hours
17 / 15 hours
Three triangles and two squares make 24
Two squares plus five triangles is 32
What's the triangle? What's the square?
4 and 6, respectively
What fraction of an hour is equal to one third of two hours
2/3
2/3
2/3
Triangle plus circle plus square equals 46, triangle plus circle equals 28, triangle plus square equals 24, triangle equals how many, circle equals how many, square and so on
Square: 46-28 = 18 circle: 46-24 = 22 triangle: 28-22 = 6 hope to accept