Is prove-2sin(x)=-sin(2x) ?

The answer to whether prove-2sin(x)=-sin(2x) is False

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

prove-2sin(x)=-sin(2x)

prove

- 2 sin (x) = - sin (2 x)

False

Solution steps

- 2 sin (x) = - sin (2 x)

Show that the two sides are not equal

For

- 2 sin (x) = - sin (2 x)

plug in

x = 1

- 2 sin (1) = - 1.68294 \dots

- 2 sin (1)

Refine to a decimal form

= - 1.68294 \dots

- sin (2 \cdot 1) = - 0.90929 \dots

- sin (2 \cdot 1)

Refine to a decimal form

= - 0.90929 \dots

The two sides are not equal

\Rightarrow False

\frac{1}{1 - \frac{1}{( 1 - \frac{1}{( 1 - c o s h ^{2} ( x ) )} )}} = cosh^{2} (x)

(\frac{sec ( θ )}{cos ( θ )}) - (\frac{tan ( θ )}{cot ( θ )}) = 1

sin (π) = sin (3 π)

cos^{2} (x) sin^{2} (x) + cos^{4} (x) = cos^{2} (x)

cos (x) sin (x) + cos^{2} (x) = 1

Is prove-2sin(x)=-sin(2x) ?
The answer to whether prove-2sin(x)=-sin(2x) is False