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Anu can complete a piece of work in 22 days. Shama is 60% more efficient than Anu. How many days does Shama alone take to complete the same piece of work?

If \( tan^2\theta + tan^4\theta = 1 \), then:

sin(40° +θ)⋅cos(10° +θ)−cos(40° +θ)⋅sin(10° +θ) is equal to

The value of (1 + sec20° + cot70°)(1 - cosec20° + tan70°) is: