* If cos330°=(√3/2) then prove that;
Please solve this question.

We can use the following equation to determine the value of 165 degrees;

1 - cos(2x)

_______     =     sin²x

     2

Here x = 165 degrees, as we want to prove the value of sin(165)

So that would make 2x = 165(2) = 330. We know cos(330) = √3/2. If we substitute;

1 - √3/2

_______     =    sin²x,

    2

sin = √(1 - √3/2)/2 = √((2 - √3)/4) = √2(√3 - 1) / 4

= √3 - 1 / 2√2 (Proved)

Step-by-step explanation:

Im sorry but knowing formula this is the answer I get

1/4 and 8/3 because:

the reciprocal if 4 is 1/4 because 4 is used as 4/1 and the opposite of that is 1/4. the opposite of 3/8 is 8/3 so that is the answer.

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step-by-step explanation: