Question

pls give me proper step to solve​

Answer 1

Answer:

-1/2

value of sin 30° is 1/2

Value of cos 30° is ✓3/2

now substituting the values in the equation

${ (\frac{1}{2} })^{2} - { (\frac{ \sqrt{3} }{2}) }^{2} \\ = \frac{1}{4} - \frac{3}{4} \\ = - \frac{2}{4} \\ = - \frac{1}{2}$

the required answer is - 1/2

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