Sin (1/2 cos-1 4/5)
Cos (tan-1 3/4) =
4/5
2/5
1/4
3/4
The product s(s-a) (s-b) (s-c) is equal to
Δ
Δ2
2 Δ
Δ/s
The value of is
3/16
3/8
1/2
In a ΔABC, ∠A = π/2, then cos2 B + cos2 C equals
-2
-1
1
0
tan-1 (1/7) + tan-1 (1/13) =
tan-1(1/9)
tan-1 (20)
tan-1(2/9)
tan-1(3/4)
2
√2
3
The value of tan 40o + tan 20o + √3 tan 20o tan 40o is equal to
√12
1/√3
√3
√3/2
tan (735o) = tan (2 × 360o + 15o)
Sin 35o
Cos 15o
tan 15o
cot 15o
