Question

find the value of sin square 30 degree - cos square 30 degree ​

Answer 1

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Answer 2

Answer:

cos

2

30°−sin

2

30°

=(

2

3

)

2

−(

2

1

)

2

=

4

3

−

4

1

=

2

1

=cos60°

Hence, the answer is cos60°.