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