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Using double-angle identities, find the exact value of the trig function below. sin2\alpha if sin\alpha=(5)/(13), cos\alpha=(12)/(13)
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Using double-angle identities, find the exact value of the trig function below. sin2\alpha if sin\alpha=(5)/(13), cos\alpha=(12)/(13)
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Sep 22, 2018
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Using double-angle identities, find the exact value of the trig function below.
sin2
if sin
=
, cos
=
Mathematics
high-school
Imakewebthings
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Answer:
sin2 if sin=, cos=
Explanation:
its the best anwser
ChildrenOurFuture
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Sep 23, 2018
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ChildrenOurFuture
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sin 2α=2(sinα)(cosα)
Data:
sin α=5/13
cos α=12/13
sin 2α=2(sin α)(cos α)
sin 2α=2(5/13)(12/13)
sin 2α=120/169
Answer: sin 2α=120/169
we can check it out our answer:
sin α=5/13
α=sin⁻¹ (5/13)≈22.62º
cos α=12/13
α=cos⁻¹ (12/13)≈22.62º
2α=2(22.62º)=45.24º
2α=sin⁻¹ (120/169)=45.24º
Bartosz X
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Sep 27, 2018
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Bartosz X
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