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# maths question how do i work it out???? question 2.) cos30 watch

1. ??? I need help
2. assuming the question is in the title all you gotta do is get a calculator whack on the cos symbol whack the numbers in and whack equals. Job done. Remember to use a scientific calculator.

3. Where x is the number you want to find the cosine of and ! is factorial. For example, 5!, “five factorial”, equals 1 times 2 times 3 times 4 times 5, which is 120, and so, 6! = 720

Simply sub 30 into the x position and off you go. Should be fine in your head
4. Or use a calculator
5. How would i do that? Cos30 graph so is it cos(0)x30 cos(90)x30 ?????? Idk how to draw it the graph
6. (Original post by Tubbz)

Where x is the number you want to find the cosine of and ! is factorial. For example, 5!, “five factorial”, equals 1 times 2 times 3 times 4 times 5, which is 120, and so, 6! = 720

Simply sub 30 into the x position and off you go. Should be fine in your head
I’m pretty sure the OP is wanting an exact surd term as opposed to a decimal approximation.

7. (Original post by notnek)
i’m pretty sure the op is wanting an exact surd term as opposed to a decimal approximation.

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Updated: February 21, 2018
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