kaylala
TOPIC: (trigonometry) Addition and Subtraction Identity FOrmulas
Find the value of:
sin(105)



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kaylala
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@agent0smith

kaylala
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@Loser66

kaylala
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@Compassionate

agent0smith
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105 = 60 + 45
and sin(x) = sinx
so sin(105) = sin(60+45)

kaylala
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is the answer = (2(sqrt6))/4
?
@agent0smith

agent0smith
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I don't know, wolfram alpha could check for you. Just use the angle sum formula

kaylala
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i did it but i'm not sure with the signs