GCSE Maths: Inverse Cos and Tan on your Calculator
We can find V by telling our calculator that 0·556 is the cos of V , and it will tell us V if we use inverse-cos. Try this: [inv] [cos] [0] [·] [5] [5] [6] [=] 56.2 - close enough. We can find W in a similar way: tan W = opposite ÷ adjacent = 2 ÷ 3 = 0·66...