Q.1. If tan A = (1- cos B)/sinB , then tan 2A = tan B. (1983 - 1 Mark)
∴ Statement is true.
Q.2. There exists a value of θ between 0 and 2π that satisfies the equation sin4θ - 2 sin2θ - 1 = 0 . (1984 - 1 Mark)
Sol. Given equation is sin4θ- 2 sin2θ - 1=0 Here,
D = 4 + 4 = 8
But sin2θ can not be –ve
Thus there is no value of θ which satisfy the given equation.
∴ Statement is false.