Question

please solve this question p​

Answer 1

Step-by-step explanation:

$\huge \boxed{ \fcolorbox{green}{red}{good \: morning}}$

value is:

2sincostheta=2×2×1/√5×√5

cos²-sin²=1×2²/5×5

thus,

4/5/4/25

5

thus, answer is 5

$\huge \boxed{ \fcolorbox{green}{red}{thank you}$