Question

Sina +sin 3a+sin 5a+sin 7a=4a cos cos 2a sin 4a

Answer 1

Ответ:

Объяснение:скачай фотомач fhotomath

Answer 2

The equation you've provided seems to be a trigonometric equation involving various trigonometric functions and angles. It's not clear what you're asking for specifically. Are you looking for a solution to this equation, or do you have a question related to it? Please provide more context or details so that I can assist you better.