Question

6. If y sin 45° cos 45° = tan' 45° - cos 30°, then y ... (b)1/2 (a) -1/2 1 (c)-2 (d) 2​

Answer 1

Step-by-step explanation:

y sin45° cos45° = tan45° - cos30°

$y \times \frac{1}{ \sqrt{2} } \times \frac{1}{ \sqrt{2} } = 1 - \frac{ \sqrt{3} }{2} \\ y \times \frac{1}{2} = \frac{2 - \sqrt{3} }{2} \\ \frac{y}{2} = \frac{2 - \sqrt{3} }{2} \\ y = 2 - \sqrt{3}$