Asked by Anonymous

Use a compound angle formula for sine to show that
sine2(theta) = 2sine(theta)cos(theta)
Answered by bobpursley
Take this formula
Sin(A+B)= SinAcosB+ SinBcosA
now make A=b and you have it.
Answered by john
if the tangent of 44 degrees is .966 what is the cotangent of 46 degrees