Question

Cos2a+sin2a*cos2a/2sin^2a - 1​

Answer 1

Ответ:

на фото

Объяснение:

если что спрашивай

Answer 2

Let's simplify the given expression step by step:

Expression: cos^2(a) + sin^2(a)*cos^2(a)/(2sin^2(a)) - 1

Step 1: Recall the trigonometric identity cos^2(a) + sin^2(a) = 1, which applies to any angle 'a'.

Expression after Step 1: 1 + sin^2(a)*cos^2(a)/(2sin^2(a)) - 1

Step 2: Cancel out the "1" terms.

Expression after Step 2: sin^2(a)*cos^2(a)/(2sin^2(a))

Step 3: Now, cancel out the common factor sin^2(a) in the numerator and denominator.

Expression after Step 3: cos^2(a)/2

So, the simplified expression is: cos^2(a)/2