Question

Cos(65)= square root 1+cos(130)/2

Answer 1

Answer:

Step-by-step explanation:

Cos(65°) = √(1 + cos(130°)) / 2

0.42=√(1 - 0.64)/2

0.42=√(0.36)/2

0.42²=√0.18²

Answer 2

The two sides of the equation are not equal. Therefore, the equation Cos(65°)=√[1+cos(130)]/2 is false.

What is an equation?

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

The left side of the equation is equal to,

Cos(65°) = 0.42262

The right side of the equation is equal to,

$\dfrac{\sqrt{1+cos(130^o)}}{2}$ = 0.1786

Hence, the two sides of the equation are not equal. Therefore, the equation Cos(65°)=√[1+cos(130)]/2 is false.

The complete question is:

Is the given equation Cos(65°)=√[1+cos(130)]/2, true or false?

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