Question

what is the value of sin 225°

Answer 1

sin 225

=sin(3×90-45)

=-cos45

=-1/√2

Answer 2

Answer:

$The \: value \: sin225\degree = \frac{-1}{\sqrt{2}}$

Step-by-step explanation:

The value of sin 225°

= sin(180°+45°)

= -sin 45°

/* sin(180°+A) = -sinA */

= $\frac{-1}{\sqrt{2}}$

Therefore,

$The \: value \: sin225\degree = \frac{-1}{\sqrt{2}}$

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