Higher Maths Formula Flashcards
1
Q
To work out sin×=sinx for below 180
A
Sinx=sin(180-x)
2
Q
To work out sinx=sinx for above 180
A
Sinx=sinx(540-x)
3
Q
To work out cosx=cosx
A
Cosx=cos(360-x)
4
Q
Height
A
= sin
5
Q
Width
A
= cos
6
Q
Tangent
A
Gradient
7
Q
Tan x= tanx
A
Tanx=tan(180+x)
8
Q
Mid point
A
X1 + X2/ 2, y1+y2/2
9
Q
Distance between two points
A
Square root of (x-x2)² + (y-y2)²
10
Q
When two circles touch at one point Externally
A
D=r¹+r²
11
Q
Two circles touch Internally
A
D=r¹-r²
12
Q
Circles intersect at two points
A
D<r¹+r²
13
Q
When points don’t touch
A
D>r¹+r²
14
Q
When there is two real and distinct roots
A
B² - 4ac >0
15
Q
When there is one real reapted rootsb
A
If b² - 4ac =0
