In the triangle Def D90 deg E68 deg and ef 11 cm find DE

EF is the hypoteneuse and we're trying to find the side adjacent to angle E, i.e., DE

So, we can use the cosine for this....we have

cos(68) = DE/11   mutiply both sides by 11

11* cos (68) = DE = about 4.12

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The second one is just like the first...we know the hypoteneuse XY and we're trying to find the adjacnt side to angle Y, i.e., ZY

So we have

cos (15) = ZY / 14

14 * cos (15) = ZY = about  13.52

In triangle GHI H=90 deg GI÷52 CM AND IH =21CM find angle I