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إحصائيات
مسائل علم المثلثات مشهورة
identity 1-2cos^2(x)
identity
1
−
2
cos
2
(
x
)
identity-csc^2(x)+cot^2(x)
identity
−
csc
2
(
x
)
+
cot
2
(
x
)
identity (2tan(x))/(1-tan^2(x))
identity
2
tan
(
x
)
1
−
tan
2
(
x
)
identity sin(x)cos(y)+cos(x)sin(y)
identity
sin
(
x
)
cos
(
y
)
+
cos
(
x
)
sin
(
y
)
identity cos^2(3x)+sin^2(3x)
identity
cos
2
(
3
x
)
+
sin
2
(
3
x
)
identity sec(-x)
identity
sec
(
−
x
)
identity 2cos^2(x)-1
identity
2
cos
2
(
x
)
−
1
identity cos^2(2x)+sin^2(2x)
identity
cos
2
(
2
x
)
+
sin
2
(
2
x
)
identity (sin^2(θ))/(cos^2(θ))
identity
sin
2
(
θ
)
cos
2
(
θ
)
identity 1/(csc(θ))
identity
1
csc
(
θ
)
identity cos(2A)
identity
cos
(
2
A
)
identity cos(s+t)
identity
cos
(
s
+
t
)
identity cos(α+β)
identity
cos
(
α
+
β
)
identity sec(-u)
identity
sec
(
−
u
)
identity cos(2α)
identity
cos
(
2
α
)
identity tan(α+β)
identity
tan
(
α
+
β
)
identity sin(α+β)
identity
sin
(
α
+
β
)
identity cos^2(θ)+sin^2(θ)
identity
cos
2
(
θ
)
+
sin
2
(
θ
)
identity tan^2(θ)+1
identity
tan
2
(
θ
)
+
1
identity cos^2(θ)-1
identity
cos
2
(
θ
)
−
1
identity 1/(cot(θ))
identity
1
cot
(
θ
)
identity cos(θ)sin(θ)
identity
cos
(
θ
)
sin
(
θ
)
identity cos(-u)
identity
cos
(
−
u
)
identity cosh^2(x)
identity
cosh
2
(
x
)
identity arctanh(x)
identity
arctanh
(
x
)
identity sin(2X)
identity
sin
(
2
X
)
identity cos^2(y)
identity
cos
2
(
y
)
identity sin^2(-x)+cos^2(-x)
identity
sin
2
(
−
x
)
+
cos
2
(
−
x
)
identity 1/(sec(θ))
identity
1
sec
(
θ
)
identity cot(u)
identity
cot
(
u
)
identity sin(u)sin(v)
identity
sin
(
u
)
sin
(
v
)
identity tan(u)
identity
tan
(
u
)
identity (cos^2(x))/(sin(x))
identity
cos
2
(
x
)
sin
(
x
)
identity tan(A+B)
identity
tan
(
A
+
B
)
identity sin(u-v)
identity
sin
(
u
−
v
)
identity tan(a+b)
identity
tan
(
a
+
b
)
identity 1-sec^2(x)
identity
1
−
sec
2
(
x
)
identity cos^2(v)+sin^2(v)
identity
cos
2
(
v
)
+
sin
2
(
v
)
identity tan(-θ)
identity
tan
(
−
θ
)
identity arcsinh(x)
identity
arcsinh
(
x
)
identity-cot^2(x)+csc^2(x)
identity
−
cot
2
(
x
)
+
csc
2
(
x
)
identity cos(2u)
identity
cos
(
2
u
)
identity sin(A+B)
identity
sin
(
A
+
B
)
identity sin^2(-θ)+cos^2(-θ)
identity
sin
2
(
−
θ
)
+
cos
2
(
−
θ
)
identity sech(x)
identity
sech
(
x
)
identity sin(2(x))
identity
sin
(
2
(
x
)
)
identity cos(2X)
identity
cos
(
2
X
)
identity cos(2y)
identity
cos
(
2
y
)
identity cos^2(4x)+sin^2(4x)
identity
cos
2
(
4
x
)
+
sin
2
(
4
x
)
identity-sin^2(x)-cos^2(x)
identity
−
sin
2
(
x
)
−
cos
2
(
x
)
identity cos(A)cos(B)+sin(A)sin(B)
identity
cos
(
A
)
cos
(
B
)
+
sin
(
A
)
sin
(
B
)
identity 1+tan^2(A)
identity
1
+
tan
2
(
A
)
identity (cos(x))(sin(x))
identity
(
cos
(
x
)
)
(
sin
(
x
)
)
identity sin(t)
identity
sin
(
t
)
identity tan(φ-α)
identity
tan
(
φ
−
α
)
identity cot(-x)
identity
cot
(
−
x
)
identity sin(s+t)
identity
sin
(
s
+
t
)
identity csch(x)
identity
csch
(
x
)
identity csch^2(x)
identity
csch
2
(
x
)
identity sin(x)*cos(y)
identity
sin
(
x
)
·
cos
(
y
)
identity (sinh(x))/(cosh(x))
identity
sinh
(
x
)
cosh
(
x
)
identity tan(α-β)
identity
tan
(
α
−
β
)
identity csc^2(θ)-cot^2(θ)
identity
csc
2
(
θ
)
−
cot
2
(
θ
)
identity cos(β)
identity
cos
(
β
)
identity (cos^4(x))/(sin^6(x))
identity
cos
4
(
x
)
sin
6
(
x
)
identity (cos^2(θ))/(sin^2(θ))
identity
cos
2
(
θ
)
sin
2
(
θ
)
identity sinh(z)
identity
sinh
(
z
)
identity cos(2r)
identity
cos
(
2
r
)
identity csc(A)
identity
csc
(
A
)
identity sin(u)
identity
sin
(
u
)
identity sin(A-B)
identity
sin
(
A
−
B
)
identity sin^2(t)
identity
sin
2
(
t
)
identity tan^2(A)+1
identity
tan
2
(
A
)
+
1
identity sin(d)
identity
sin
(
d
)
identity-cot^2(y)+csc^2(y)
identity
−
cot
2
(
y
)
+
csc
2
(
y
)
identity sin^2(θ)-cos^2(θ)
identity
sin
2
(
θ
)
−
cos
2
(
θ
)
identity 1/(cos(y))
identity
1
cos
(
y
)
identity-sin^2(2t)-cos^2(2t)
identity
−
sin
2
(
2
t
)
−
cos
2
(
2
t
)
identity sec^2(θ)-tan^2(θ)
identity
sec
2
(
θ
)
−
tan
2
(
θ
)
identity cos(x)*2sin(x)
identity
cos
(
x
)
·
2
sin
(
x
)
identity cos^2(φ)+sin^2(φ)
identity
cos
2
(
φ
)
+
sin
2
(
φ
)
identity cos^2(10x)+sin^2(10x)
identity
cos
2
(
1
0
x
)
+
sin
2
(
1
0
x
)
identity 1-sech^2(x)
identity
1
−
sech
2
(
x
)
identity 1-sec^2(t)
identity
1
−
sec
2
(
t
)
identity cos(z)
identity
cos
(
z
)
identity 1+sinh^2(x)
identity
1
+
sinh
2
(
x
)
identity sin^2(v)-cos^2(v)
identity
sin
2
(
v
)
−
cos
2
(
v
)
identity sin^2(x)-1
identity
sin
2
(
x
)
−
1
identity (cos(θ))/(sin^2(θ))
identity
cos
(
θ
)
sin
2
(
θ
)
identity (cos^2(t))/(sin^2(t))
identity
cos
2
(
t
)
sin
2
(
t
)
identity 2sin(x)*cos(x)
identity
2
sin
(
x
)
·
cos
(
x
)
identity tan(2B)
identity
tan
(
2
B
)
identity cos^2(t)-sin^2(t)
identity
cos
2
(
t
)
−
sin
2
(
t
)
identity tan^2(t)
identity
tan
2
(
t
)
identity cos^2(6x)+sin^2(6x)
identity
cos
2
(
6
x
)
+
sin
2
(
6
x
)
identity cos(o)
identity
cos
(
o
)
identity 2cos(θ)sin(θ)
identity
2
cos
(
θ
)
sin
(
θ
)
identity sinh^2(u)-cosh^2(u)
identity
sinh
2
(
u
)
−
cosh
2
(
u
)
identity cos^2(pit)+sin^2(pit)
identity
cos
2
(
π
t
)
+
sin
2
(
π
t
)
identity 2cos(u)*sin(u)
identity
2
cos
(
u
)
·
sin
(
u
)
1
..
217
218
219
220
221
..
345
