Which of the following is correct?
The value of 2 sin2 θ + 4 cos (θ + α). sin α. sin θ + cos 2(α + θ) is:
If sin6 θ + cos6 θ + k cos2 2θ = 1, then k is equal to:
Which of the following is rational number
In ΔABC, the line joining the circumcentre to the incentre is parallel to BC, then cos B + cos C is equal to
The minute hand of a clock is 10 cm long. How far does the tip of the hand move in 20 minutes?