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If tan|+sin|=m and tan|- sin|=n, show that (m2-n2)=4?mn

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Is it necessary to join a tuition class in class 10?
It is not necessary but if you have any doubts, you should clear it with your family person or a tutor. If your basics are clear you can practice through reference books.
Harsha
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Write the zeroes of the polynomial x2 + 2x + 1.
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Mukundan
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The diameter of a sphere is 28 cm. Find the cost of painting it all around at Rs. 0.10 per square cm.
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A man buys a cycle for Rs 1400 and sells it at a loss of 15%. What is the selling price of the cycle?
Loss = Loss%/100 * CP = (15/100) * 1400 = 210 SP = CP - Loss = 1400 - 210 = 1190
Shubham

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