Question

7. If y sin 45° cos 45° = tan2 45° – cos2 30°, then y = …

(a) – (b) (c) -2 (d) 2
​

Answer 1

Step-by-step explanation:

Given.....

y sin 45° cos 45° = tan^2 45° - cos^ 2 30 °

y 1/√2 . 1/√2 = (1)^2 - (√3/2 )^2 ...

y 1/2 = 1- 3/4

y 1/2 = 4-3/4

y 1/2 = 1/4

y = 2/4

y = 1/2....

hence y = 1/2 ......

I hope you understand .....