How do I find the value of sin (5Pi/4)?

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Nghi N. Share
Sep 24, 2015

Answer:

Find #sin ((5pi)/4)#

Ans: #-sqrt2/2#

Explanation:

Trig unit circle shows -->
#sin ((5pi)/4) = - sin (pi/4)#
Trig Table of Special Arcs gives --> #sin (pi/4) = sqrt2/2#, therefor:
#sin ((5pi)/4) = - sqrt2/2#

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Write your answer here...
Start with a one sentence answer
Then teach the underlying concepts
Don't copy without citing sources
preview
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Answer

Write a one sentence answer...

Answer:

Explanation

Explain in detail...

Explanation:

I want someone to double check my answer

Describe your changes (optional) 200

2
Ben Share
Sep 24, 2015

Answer:

Use a graphing calculator and enter the problem sin(5ñ/4)

Explanation:

The answer leads to -0.7071067812

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