ruperttshepo ruperttshepo
  • 02-05-2021
  • Mathematics
contestada

If sin12 = k determine cos24 in terms of k

Respuesta :

LammettHash
LammettHash LammettHash
  • 02-05-2021

Recall the double-angle identity,

sin²(x) = (1 - cos(2x)) / 2

Now if sin(12°) = k, then

k ² = sin²(12°) = (1 - cos(24°)) / 2

→   cos(24°) = 1 - 2k ²

Answer Link

Otras preguntas

what led to the creation of feudalism?
the "boom" years of the 1920's were characterized by what?
the sum of a negative number, ¼ of the negative number, and 7/16 off the negative number = -13½. what is the negative number?
438 people signed up for a city soccer league. the league places 15 people on each team. How many teams are there? A: Is This Division B: Is This Multiplicatio
A boat travels 45 miles upstream (against the current) in 5 hours. The boat travels the same distance downstream in 3 hours. What is the rate of the boat in sti
what organization is a interest group
Could someone Please give the answer to... 112 greater than or equal to b+128
what is the best analogy for mother and mater
what is 5/6 times 120 =
A burning leaf gives off: heat energy mechanical energy potential energy