Question
21 32 54 86 131
186 Find out the wrong number in the following given number series :Solution
21 + 11 = 32 32 + 22 = 54 54 + 33 = 87 87 + 44 = 131 131 + 55 = 186
If cot A = √3, then what will be the value of sin4 A?
If cos2B = sin(1.5B + 48o), then find the measure of 'B'.
- Determine the value of :

In a right triangle ABC, angle B = 90°. If tan A = 3/4 and the length of the hypotenuse is 25 cm, find the area of the triangle.
sin2 12˚ + sin2 14˚ + sin2 16˚ + sin2 18˚ + ……… + sin2 78˚ =?
Simplify the given equation:

- If tan3θ = 1, then find the value of: (sin² 2θ/sec 3θ + 15°)
- If sin (4A − 5B) = (√2/2) and cos (A + B) = (√2/2), where 0° < A, B < 90°, then find the value of ‘A’.
If sec 2A = sin2  60o  + sec 60o  - cos2 30 o , then find the value of (√3tan A + cot ...
If tanθ + secθ = 5, find the value of sinθ.