What is expand (1-sin(a))(1+sin(a)) ?

The solution to expand (1-sin(a))(1+sin(a)) is cos^2(a)

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expand (1-sin(a))(1+sin(a))

expand

(1 - sin (a)) (1 + sin (a))

cos^{2} (a)

Solution steps

(1 - sin (a)) (1 + sin (a))

Apply Difference of Two Squares

(1 - sin (a)) (1 + sin (a)) : cos^{2} (a)

= cos^{2} (a)

(2 x - 5)^{2}

\frac{e ^{- x}}{( 1 + e ^{- x} ) ^{2}}

x^{\frac{1}{3}} (x - 4)

- 211 (4 + 37)

\frac{1}{s ( s + 2 )}

What is expand (1-sin(a))(1+sin(a)) ?
The solution to expand (1-sin(a))(1+sin(a)) is cos^2(a)