Question

Solve for xx. Round to the nearest tenth, if necessary. ​

Answer 1

Answer:

x = 4.3

Step-by-step explanation:

$cos 21 = \frac{adjacent}{hypotenuse} = \frac{4}{x}\\\\x = \frac{4}{cos21} = 4.28$

x= 4.3

Answer 2

Answer:

Step-by-step explanation:

take 21 degree as reference angle

using cos rule

cos 21=adjacent/hypotenuse

0.93=4/x

x=4/0.93

x=9.67

x=9.7