Question

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Answer 1

Answer:

if O is the origin

Step-by-step explanation:

now from the given values with you , you can find out the answer

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Answer 2

Answer:

x = 1 / √2   ;   y = 1 / √2  

Relation : x^2 + y^2 = 1

Step-by-step explanation:

 Given circle has a unit radius.

Radius = 1

 x cordinate = x

 y cordinate = y

Here, by Pythagoras theorem,

 ⇒ height^2 + base^2 = hypotenuse^2

 ⇒ x^2 + y^2 = radius^2

 ⇒ x^2 + y^2 = 1^2

 ⇒ x^2 + y^2 = 1

Here,

   sin45° = x / radius

   1 / √2 = x / 1

   x = 1 / 2

  Also, cos45° = y / radius

    1 / √2 = y / 1

  y = 1 / √2