Question

Sin a\1+cos a + sin a\1-cos a​

Answer 1

(sin a(1-cos a)+sina(1+ cos a)) /( 1 - $cos^{2} a$)

(sin a(1-cos a)+sina(1+ cos a)) /$sin^{2} a$

(1-cos a +1 +cos a)/sin a

1/sin a - Ответ

Answer 2

It seems like you're trying to write an expression involving trigonometric functions, but the notation you've used is a bit unclear. I'll provide two interpretations of the expression based on the possibilities:

1. If you meant to write: (sin(a) / (1 + cos(a))) + (sin(a) / (1 - cos(a)))

   You can simplify this expression by finding a common denominator:

   (sin(a)(1 - cos(a)) + sin(a)(1 + cos(a))) / (1 - cos^2(a))

   Now, you can use the Pythagorean identity sin^2(a) + cos^2(a) = 1 to simplify further:

   (sin(a)(1 - cos(a) + 1 + cos(a))) / sin^2(a)

   This simplifies to:

   (2sin(a)) / sin^2(a)

   And finally:

   2 / sin(a)

2. If you meant to write something different, please provide more context or clarify the expression you're looking for, and I'll be happy to assist further.