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常见 三角函数 问题
sin(x)cos(x-60)=0
sin
(
x
)
cos
(
x
−
6
0
◦
)
=
0
1+cos(a)=(2cos^2(a))/2
1
+
cos
(
a
)
=
2
cos
2
(
a
)
2
cos(x)+cos^4(x)= 1/2
cos
(
x
)
+
cos
4
(
x
)
=
1
2
sin^2(x)=sec(x)
sin
2
(
x
)
=
sec
(
x
)
5sin^2(x)-11sin(x)+2=0
5
sin
2
(
x
)
−
1
1
sin
(
x
)
+
2
=
0
3cos^2(x)-sin^2(x)-sin^2(x)=0
3
cos
2
(
x
)
−
sin
2
(
x
)
−
sin
2
(
x
)
=
0
3sin(a)+cos(a)=1
3
sin
(
a
)
+
cos
(
a
)
=
1
4cos^2(x)+sqrt(3)=2(sqrt(3)+1)
4
cos
2
(
x
)
+
√
3
=
2
(
√
3
+
1
)
2tan^2(x)+cot^2(x)-3=0
2
tan
2
(
x
)
+
cot
2
(
x
)
−
3
=
0
((2sin(x)-1))/((sin(x)+5))=0
(
2
sin
(
x
)
−
1
)
(
sin
(
x
)
+
5
)
=
0
sec^2(b)=2+tan(b)
sec
2
(
b
)
=
2
+
tan
(
b
)
cos^{23}(x)+cos^2(x)=0
cos
2
3
(
x
)
+
cos
2
(
x
)
=
0
sin(b)=0.775
sin
(
b
)
=
0
.
7
7
5
-2cos^2(x)+3sin(x)+3=0
−
2
cos
2
(
x
)
+
3
sin
(
x
)
+
3
=
0
2cos^2(x)=sqrt(3)*cos(x)
2
cos
2
(
x
)
=
√
3
·
cos
(
x
)
4(cos(x)+1)cos(x)=3
4
(
cos
(
x
)
+
1
)
cos
(
x
)
=
3
sin^2(x)+1=cos^2(x)-2sin^4(x)
sin
2
(
x
)
+
1
=
cos
2
(
x
)
−
2
sin
4
(
x
)
tan^2(x)-1=2
tan
2
(
x
)
−
1
=
2
cos(2a)= 2/3 ,sin(a)
cos
(
2
a
)
=
2
3
,
sin
(
a
)
cot(2x-3)-1=0
cot
(
2
x
−
3
)
−
1
=
0
4sin^{32}(x)-3cos^2(x)=0
4
sin
3
2
(
x
)
−
3
cos
2
(
x
)
=
0
4tan^2(x)+15sec(x)=0
4
tan
2
(
x
)
+
1
5
sec
(
x
)
=
0
sin^4(x)+cos^4(x)=cos^4(x)
sin
4
(
x
)
+
cos
4
(
x
)
=
cos
4
(
x
)
cot(x)= 40/32
cot
(
x
)
=
4
0
3
2
tan(a)= 3/8
tan
(
a
)
=
3
8
sin(2x+10)=cos(3x-20)
sin
(
2
x
+
1
0
)
=
cos
(
3
x
−
2
0
)
sin^3(x)=-2/3
sin
3
(
x
)
=
−
2
3
solvefor x,tan^2(x)=tan^2(y)
solvefor
x
,
tan
2
(
x
)
=
tan
2
(
y
)
2cos^2(x)(1+2cos^2(x))=2
2
cos
2
(
x
)
(
1
+
2
cos
2
(
x
)
)
=
2
-6sin(x)-5cos(x)=2
−
6
sin
(
x
)
−
5
cos
(
x
)
=
2
2sin^2(x)+cos^2(x)=2
2
sin
2
(
x
)
+
cos
2
(
x
)
=
2
2sin^2(x)+sin^2(x)+cos^2(x)=1
2
sin
2
(
x
)
+
sin
2
(
x
)
+
cos
2
(
x
)
=
1
sin^2(x)+3cos(x)-1=0
sin
2
(
x
)
+
3
cos
(
x
)
−
1
=
0
cos((3x-7)/2)=0
cos
(
3
x
−
7
2
)
=
0
3tan^2(x)= 8/(sin^2(x))
3
tan
2
(
x
)
=
8
sin
2
(
x
)
sin^2(x)+sin^{22}(x)+sin^{23}(x)=1
sin
2
(
x
)
+
sin
2
2
(
x
)
+
sin
2
3
(
x
)
=
1
5sin(1.75x)=1.4
5
sin
(
1
.
7
5
x
)
=
1
.
4
cos(a-5)=0.675
cos
(
a
−
5
)
=
0
.
6
7
5
cos(7a)=sin(a-6)
cos
(
7
a
)
=
sin
(
a
−
6
)
sin^5(x)+2cos^2(x)=1
sin
5
(
x
)
+
2
cos
2
(
x
)
=
1
cos^3(x)+sin^2(x)=0
cos
3
(
x
)
+
sin
2
(
x
)
=
0
cos^{22}(x)+sin^2(x)-1=0
cos
2
2
(
x
)
+
sin
2
(
x
)
−
1
=
0
sin(x)+cos(x)=2cos(x)
sin
(
x
)
+
cos
(
x
)
=
2
cos
(
x
)
sin(x)cos(x^2)=0
sin
(
x
)
cos
(
x
2
)
=
0
5sin(2x)+9sin(x)=0
5
sin
(
2
x
)
+
9
sin
(
x
)
=
0
4sin(x)-6cos(x)=3
4
sin
(
x
)
−
6
cos
(
x
)
=
3
4cos(x)=cos^3(x)
4
cos
(
x
)
=
cos
3
(
x
)
cos^2(a)= 3/(5sin(a))
cos
2
(
a
)
=
3
5
sin
(
a
)
3cos(x)=2sec(x)-5
3
cos
(
x
)
=
2
sec
(
x
)
−
5
sin(a/2)=(1/2)sin(a)
sin
(
a
2
)
=
(
1
2
)
sin
(
a
)
cos(x/2)=cos(x)+1
cos
(
x
2
)
=
cos
(
x
)
+
1
d=(sin^4(x)-cos^2(x)+5)/(4*cos^2(x))
d
=
sin
4
(
x
)
−
cos
2
(
x
)
+
5
4
·
cos
2
(
x
)
2+cos^2(x)=5sin(x)
2
+
cos
2
(
x
)
=
5
sin
(
x
)
tan^3(3x)-2sin^3(3x)=0
tan
3
(
3
x
)
−
2
sin
3
(
3
x
)
=
0
cot^5(x)=(-1)/((sqrt(3)))
cot
5
(
x
)
=
−
1
(
√
3
)
2cos^4(x)cos(x)-cos^5(x)=1
2
cos
4
(
x
)
cos
(
x
)
−
cos
5
(
x
)
=
1
cos^4(x)-2sin^2(x)-1=0
cos
4
(
x
)
−
2
sin
2
(
x
)
−
1
=
0
d^2(1+cos(x))-(1+cos(x))^2=sin^2(x)
d
2
(
1
+
cos
(
x
)
)
−
(
1
+
cos
(
x
)
)
2
=
sin
2
(
x
)
cos^4(x)-2cos^2(x)+1=0
cos
4
(
x
)
−
2
cos
2
(
x
)
+
1
=
0
sin^2(x)+cos^2(x)+cos(x)=2
sin
2
(
x
)
+
cos
2
(
x
)
+
cos
(
x
)
=
2
(sin^3(x))/(sin(x))=0
sin
3
(
x
)
sin
(
x
)
=
0
sin(135-x)=sin(x)
sin
(
1
3
5
−
x
)
=
sin
(
x
)
tan(x)-4=-1
tan
(
x
)
−
4
=
−
1
4cos^2(x)-8cos(x)+3=0
4
cos
2
(
x
)
−
8
cos
(
x
)
+
3
=
0
sin(2x)=-0.6
sin
(
2
x
)
=
−
0
.
6
(11)/(sin(90))=(10)/(sin(x))
1
1
sin
(
9
0
◦
)
=
1
0
sin
(
x
)
2sec^2(x)+4tan(x)=1
2
sec
2
(
x
)
+
4
tan
(
x
)
=
1
8sin((3.14)/(4*x))=7
8
sin
(
3
.
1
4
4
·
x
)
=
7
cos(3x)-21cos(x)+16=0
cos
(
3
x
)
−
2
1
cos
(
x
)
+
1
6
=
0
sin^5(x)-sin(x)=0
sin
5
(
x
)
−
sin
(
x
)
=
0
tan(x)=(95.75)/4
tan
(
x
)
=
9
5
.
7
5
4
5cos^2(x)=4
5
cos
2
(
x
)
=
4
cos(x-15^0)=((sqrt(2)))/2
cos
(
x
−
1
5
0
)
=
(
√
2
)
2
sin(x)=1-cos^x(x)
sin
(
x
)
=
1
−
cos
x
(
x
)
4-7sin(x)=cos^2(x)
4
−
7
sin
(
x
)
=
cos
2
(
x
)
(d^2-2d+3)=sin(x)
(
d
2
−
2
d
+
3
)
=
sin
(
x
)
5/(tan(x))=-2
5
tan
(
x
)
=
−
2
tan^{22}(x)=sec^2(x)-1
tan
2
2
(
x
)
=
sec
2
(
x
)
−
1
tan^4(x)+tan^2(x)=tan(x)
tan
4
(
x
)
+
tan
2
(
x
)
=
tan
(
x
)
sin^4(x)+sin^2(x)=sin^6(x)
sin
4
(
x
)
+
sin
2
(
x
)
=
sin
6
(
x
)
cos(a)=(-11)/(14)
cos
(
a
)
=
−
1
1
1
4
solvefor x,sin(x/x)=0.7
solvefor
x
,
sin
(
x
x
)
=
0
.
7
5cos^2(x)+sin^2(x)=4
5
cos
2
(
x
)
+
sin
2
(
x
)
=
4
cos(u)-1.5sin^2(u)+0.1667=0
cos
(
u
)
−
1
.
5
sin
2
(
u
)
+
0
.
1
6
6
7
=
0
3sin(2x-1)=1
3
sin
(
2
x
−
1
)
=
1
solvefor m,sec(m+12)=csc(42-n)
solvefor
m
,
sec
(
m
+
1
2
◦
)
=
csc
(
4
2
◦
−
n
)
1tan(x)=sqrt(3)
1
tan
(
x
)
=
√
3
tan(x)=(1.6)/4
tan
(
x
)
=
1
.
6
4
sin^2(x)+7sin^2(x)+5cos^2(x)+3=0
sin
2
(
x
)
+
7
sin
2
(
x
)
+
5
cos
2
(
x
)
+
3
=
0
2cos(a)=3sin^2(a)
2
cos
(
a
)
=
3
sin
2
(
a
)
(11)/(cos(90))=(10)/(cos(x))
1
1
cos
(
9
0
◦
)
=
1
0
cos
(
x
)
tan^2(x)=cot^2(x)
tan
2
(
x
)
=
cot
2
(
x
)
solvefor x,cos(x/2)=-cos(2x-30)
solvefor
x
,
cos
(
x
2
)
=
−
cos
(
2
x
−
3
0
)
sqrt(1-cos(x))= 1/(2sin^2(x))
√
1
−
cos
(
x
)
=
1
2
sin
2
(
x
)
cos(2x-1)= 1/2
cos
(
2
x
−
1
)
=
1
2
tan(a)= 5/3
tan
(
a
)
=
5
3
sin(x)=0.43333333
sin
(
x
)
=
0
.
4
3
3
3
3
3
3
3
cos^6(x)+3cos^3(x)-4=0
cos
6
(
x
)
+
3
cos
3
(
x
)
−
4
=
0
-sin^2(x)=-1
−
sin
2
(
x
)
=
−
1
1+tan(x)=sec^2(x)
1
+
tan
(
x
)
=
sec
2
(
x
)
1
..
340
341
342
343
344
345
