cos-1(-1)
2=
4cos2x
+1
3
2
sin-1( )
cos0
1
7π/6, 11π/6
sec(-30°)
0°, 180°
π/4, 5π/4
tanθ = 0
cotπ/6
3
9 + sin2x = 10
Tan11π/3
3π/8, 5π/8
sin6π
2
2
−
-1
3
2
1/2
cos2x = −
2
3𝑐𝑜𝑡𝑥 − 3 = 0
2
2
− 3
cot0°
undefined
45°, 135°, 225°, 315°
csc300°
-1/2
sin210°
60°, 120°, 240°, 300°
0
π/2, 3π/2
sin270°
−2 3
3
60°, 120°
π
5 = sec2x + 3
cos5π/4
sin13π/6
6tanx – 2 = 4
cscπ/6
4sinx + 2 = 0
3
3
cos30°
tanπ/6
π/3, 4π/3
2 3
3