Sagot :
Question:
4. Solve: (5 points)
[tex] \sin \: 30^ o \: + \: cos \: 45^o \: = [/tex]
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Answer:
[tex] \frac{1 + \sqrt{2} }{2} \\ [/tex]
[tex] \sf \gray{{alternative \: forms}}[/tex]
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Solution:
[tex] \sf \red{{solving \: steps}}[/tex]
[tex] \sf \gray{{(1)simplify \: trigonometry}}[/tex]
[tex]sin \: (30 ^o) + \cos(45 ^o ) [/tex]
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Evaluate the sin (30°) to 1/2 so
[tex] \frac{1}{2} + \cos(45 ^o ) \\ [/tex]
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[tex] \sf{{evaluate \: the \: \cos(45 ^ o) to \: \sqrt{ \frac{2}{2} } \: so}} \\ [/tex]
[tex] \frac{1}{2} + \sqrt{ \frac{2}{2} } \\ [/tex]
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[tex] \frac{1}{2} + \sqrt{ \frac{2}{2} } \\ [/tex]
Write the numerators over common denominators
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[tex] \frac{1 + \sqrt{2} }{2} \\ [/tex]
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SO THE ANSWER IS
[tex] \frac{1 + \sqrt{2} }{2} \\ [/tex]