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2cos^2 B-1=tan^2A then cosA cos B =

how to find square root of big numbers

You didn't write correct formula 

Prove that the ratio of the areas of two similar triangles is equal to the square of the ratio of their corresponding medians.

 

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a board coach twenty four kilometer upstream and twenty kilometre downstream in six hours it coerced kilometre off three and twenty one kilometre dancer in six or thirty minutes find the speed of the boat in still water .

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10th satandard Karnataka state level FA-1 July 2019 mathematics

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Gst rate on purchase and sale can be same or different. If different mention some cases.

Ratio of 98 to 63

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Sir,
I have my personal problem, it would be gretaful of you if you can give a solution for this matter. Recently i brought a new phone, so i am getting very much attracted to it what has badly affected my recent results, can you give me the solution for this problem, i cannot leave my phone also as i dont go to tution so i study through online lectures and i am on class 11th. Please give me the solution of this problem as soon as possible. Waiting for your reply?

The sum of first n terms ofan ap is 4n-n*2 ,what is the first term what is sum of first two terms what is second term similarly find the3rd the10th and the nth terms

In what ways people make mistakes while sending emails

GST

Integration of cos x minus sin x upon 1 2x into DX