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In simple cos (A) = adjacent / hypotenuse

The following examples illustrates the use of cos formula

=> Cos (A) = adjacent / hypotenuse

=> Cos (A) = X / Z

=> Cos (A) = 16 / 34 = 0.471

=> Length of adjacent side = 6750

=> Length of hypotenuse = 8100

=> Use cos formula: Cos (a) = adjacent / hypotenuse

=> So, cos (a) = 6750/8100 = 0.83333

=> Find the angle using calculator cos^-1(0.83333)

=> The hypotenuse is given as 13cm and we need to find the adjacent side. This formula that connects angle, hypotenuse and adjacent side is cos formula.

=> We know that Cos (angle) = adjacent side / hypotenuse

=> Therefore, cos (60) = x / 13

=> We know that Cos (60) = ½ = 0.5

=> So, x = 13 × cos (60) = 13 x 0.5 = 6.5