SOLUTION: Can someone please help me with this problem?
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Evaluate the indicated function.
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Find the value of sin (α/2) if cos α = 20/21 and (0DEG < α < 90DEG).
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sin(
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-> SOLUTION: Can someone please help me with this problem?
.
Evaluate the indicated function.
.
Find the value of sin (α/2) if cos α = 20/21 and (0DEG < α < 90DEG).
.
sin(
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Question 643072: Can someone please help me with this problem?
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Evaluate the indicated function.
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Find the value of sin (α/2) if cos α = 20/21 and (0DEG < α < 90DEG).
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sin(α/2)= __?__
Thanks! Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website! Find the value of sin (α/2) if cos α = 20/21 and (0DEG < α < 90DEG)
Identity: sin (α/2)=√[(1-cos α)/2]
=√[(1-20/21)/2]
=√[(21/21-20/21)/2]
=√[(1/21)/2]
=√(1/42)
sin(α/2)=√(1/42)
(