` sin 75^(@)` का मान ज्ञात कीजिए ।

Explanation

` sin 75^(@) = sin ( 45^(@) + 30^(@))`
` = sin 45^(@) cos 30^(@) + cos 45^(@) sin 30^(@)`
` = 1/(sqrt(2)) * (sqrt(3))/2 + 1/(sqrt(2))* 1/2 = (sqrt(3)+1)/(2sqrt(2))`