Question

Please can someone help with this question, it would be much appreciated. Thanks

Answer 1

The value which completes the formula is 74. The value of x to the nearest integer is 17 cm

Using the cosine formula :

• a² = b² + c² - 2bcCosA

From the triangle, A = 74

x² = 11² + 16² - 2*11*16 * cos74

x² = 279.975

x = √279.975

x = 16.73

To the nearest integer , x = 17 cm