Question

1- cos 2a + sin 2а1 + cos 2a + sin 2a​

Answer 1

Ответ:

2(sin(a))² + sin(2a), 2(cos(a))² + sin2(a)

Answer 2

It looks like you've provided an expression involving trigonometric functions. However, there seems to be a typo or formatting issue in your input. The expression "cos 2a + sin 2а1 + cos 2a + sin 2a​" is not clear. Could you please provide the expression in a clearer format or provide more context? Additionally, if you have a specific question about this expression or if you'd like me to simplify it or perform any calculations, please let me know!