Alexus L.
asked • 12/05/20I don't know how to do double-angle formulas
find the exact values of sin(2u), cos(2u), and tan(2u) using the double-angle formulas.
| Cos(U) -24/25 , 𝜋/2 < u < 𝜋 |
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1 Expert Answer
Mark M. answered • 12/05/20
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Mathematics Teacher - NCLB Highly Qualified
cos u = -24 / 25 → sin u 7/ 25
sin 2u = 2 sin u cos u
sin 2u = 2 (7/25)(-24/25)
Substitute the values into the other two formulas.
Alexus L.
ok is this right sin =7/25 Cos= -336/625 what is the formula for Tan(2u)?
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12/05/20
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Mark M.
Do you have a copy of he double-angle formulas?12/05/20