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If sinθ + sin2θ + sin3θ = 1, then cos6θ - 4cos4θ + 8cos2θ is
Three men do as much work as 4 boys do and the 4 boys can together complete work in 21 days. In how many days will 9 men and 2 boys complete the same work?
The greatest value of sin4θ + cos4θ is
A sold a camera to B for Rs 4860 at a loss of 19%. Again B sold it to C at a price that would give A a profit of 17%. The gain percentage of B is
The difference between Simple Interest & Compound Interest for the fourth year is Rs 7280 at 20% per annum. What is the principal amount.