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Delicious77 [7]
4 years ago
5

Find the exact value of sin 225º without using a calculator

Mathematics
2 answers:
kirill [66]4 years ago
8 0

Step-by-step explanation:

\sin \: 225 \degree \:  \\  =  \sin \: (180 \degree + 45\degree) \\  =  -  \sin \: 45 \degree \\  =  -  \frac{1}{ \sqrt{2} }  \\  =  -  \frac{\sqrt{2}}{2}\\= -  \frac{1.4142}{2}\\=-0.7071 \\  \red{ \boxed{\therefore \:  \sin \: 225 \degree  =   - 0.7071}}

aivan3 [116]4 years ago
6 0

Answer:

-√2+√6/4

Step-by-step explanation:

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