Find the exact value of Cos(-pi/12)

2 answers:

8 0

You did ask for the EXACT value, which no one has posted yet. The exact value is √(2 + √3)/2. To three decimal places, that is .966. As for how I got that, I started with a 30-60-90 triangle and extended the longer side by the length of the hypotenuse to get a 15-75-90 triangle, then used Pythagoragus. For some reason, though, most students have an easier time using a half-angle formula, so feel free to do it that way. * * * * OK, sorry, I see Awesome Sauce also gives an exact value. It is also correct, just looks a little different. * * * * From your comment in Additional Details, it appears you want to use the angle difference relation: cos(π/12) = cos(π/4 - π/6). That works also, but you need to get the formula right, which is: cos(a - b) = cos a * cos b + sin a * sin b For cos (45 - 30), this gives cos 45 * cos 30 + sin 45 * sin 30 = √2/2 * √3/2 + √2/2 * 1/2 = √2/4(√3 + 1). This is yet another expression for the same exact value.

lesya692 [45]2 years ago

7 0

Answer:

√2+√6 x 1/4

Step-by-step explanation:

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What is an example of a non linear graph?

Xelga [282]

With the exception of the form f(x) = ax + b, non-linear graph equation can take any form.See graph in photo attached.

<h3>What is non linear function and its graph?</h3>

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To put it another way, a nonlinear function's graph is not a linear. In other words, its graph is not limited to being a line.

Any function whose graph is not a straight line should be considered a nonlinear function since a nonlinear function is one that is NOT linear.

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