Area of Δ ABC is
1/2 ab cos C
1/2 ab sin c
1/2 ab cos B
1/2 ca sin B
The principal value of sin-1 (1/2)
π
π/2
π/6
0
Sin (cos-1 (3/5) =
1/5
3/4
4/5
1/3
The value of is
2
3
1
If sin-1 (1/2) = tan-1 x, find the value of x
√3
1/2
The value of tan 40o + tan 20o + √3 tan 20o tan 40o is equal to
√12
1/√3
√3/2
Cos4 A - Sin4 A =
2 Sin2 A - 1
1 - 2 Sin2 A
2 Cos2 A - 1
1 -2 Cos2 A
tan (735o) = tan (2 × 360o + 15o)
Sin 35o
Cos 15o
tan 15o
cot 15o
Sin-1 (1/x) =
sin x
cosec-1x
cos x
cos (1/x)
3/16
3/8
