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What is the value of cos2θ – sin2θ if the length of the opposite side is 20 units and the length of the hypotenuse is 29 units?

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The section contains questions and answers on trigonometric ratios, trigonometric identities, specific and complementary angles of trigonometric ratios.


What is the value of cos<sup>2</sup>θ – sin<sup>2</sup>θ if the length of the opposite side is 20 units and the length of the hypotenuse is 29 units?






 
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