Ask a New Question

Question

Use a half-angle identity to find the exact value for sec(x/2) if sinx = -12/13 ; 3pi/2 < x < 2pi
12 years ago

Answers

Steve
Since sin = -12/13 in QIV, cos = 5/13
sec x/2 = 1/cos(x/2) = √(2/(1+cosx))
= √(1/(1+5/13)) = √(2/(18/13)) = √(26/18) = √13/3
12 years ago

Related Questions

1. Use half-angle identity to find the exact value of cos165. MY ANSWER: (-1/2)sqrt(2+sqrt(3)) 2... use an appropriate half-angle formula to find the exact value ofthe expression. tan22.5 write th... Use an angle sum identity to verify the identity cos 2 0=2 cos 0-1 use a half-angle identity to find the exact value of tan 105 degrees. Use a half measure identity to find the exact value.. Cos t= 1/3 and 0 <t<1/2 pie find sin 1/2 t.... Use the half-angle formula to simplify (sin4theta)/(1+cos4theta) How do you use the half angle formulas to determine the exact values of sine, cosine, and tangent of... Use a half-angle identity to find the exact value of tan 15° a. √ 7+4 sqrt 2 b. √ 7+4 sqrt 3 c.... An angle is 30 less than half its complement. Find the angle. the double angle identity for sin2x is sin2x=
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use