Question

1+tga сколько будет? ​

Answer 1

1/cos^2a это по тригонометрическим тотожествам

Answer 2

It seems there might be a mistake in your question. "1+tga" is not a valid mathematical expression or equation, as "tga" is not a recognized mathematical term or variable.

If "tga" is intended to be a variable or a number, please provide its value or context, so I can assist you in performing the arithmetic calculation. Alternatively, if you meant a different expression or equation, please clarify, and I'll be happy to help.