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What is the sum of cos(30-x)+cos(30+x)?

Posted by oliviao May 31, 2011 at 2:45 PM via web. Be the first to answer. »

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What is the value of sum of sqrt2/2+sinx=?

Posted by l0l1 April 30, 2011 at 4:23 PM via web. 1 educator answer. »

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calculate the sum sin x+square root(1-sin^2x)

Posted by favoritt January 26, 2011 at 4:27 PM via web. 1 educator answer. »

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