If sinφ = 1/2, then 3cosφ - 4cos3φ = ?
1
cosφ
cos2φ
0
What is the inverse of sin 60° ?
2
√3
2/√3
In right angled triangle ABC, ∠ B = 900 and ∠ C = 30o. If AC = 10 cm, find the length of the sides AB and BC.
5 cm , 5 √3 cm
4 cm, 4 √2 cm
5 cm, √3 cm
6 cm, 5 cm
If in ΔABC, ∠B = 90°, AB = 12 cm and BC = 9 cm, then the value of cos C is
3/5
3/4
5/3
4/3
If secθ + tanθ = 3 and secθ - tanθ = n, then value of mn is
± 1
± 2
If tan A = 4/3, then sinA, cosA are
sinA = 4/5, cos A = 3/5
sinA = 5/4 , cosA = 5/3
sin A = 3/4 , cosA = 4/3
sinA = 35/4, cosA = 0
cosec 74 + tan 81 equal to
sec18 + cot 10
sec17 + cot 11
sec16 + cot 9
sec19 + cot 12
If √3 tanθ = 3 sin θ, then the value of sin2θ - cos2θ is
1/√3
1/√2
1/3
1/4
If 4 sin 2 θ - 1 = 0 and θ is less than 90o, then the value of θ is
45o
60o
90o
30o
If 0 ≤ x ≤ 90, state the numerical value of x for which sin xo = cos xo.
30
45
60
90