What is expand (cos(3t)+cos(4t))^2 ?

The solution to expand (cos(3t)+cos(4t))^2 is cos^2(3t)+2cos(3t)cos(4t)+cos^2(4t)

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expand (cos(3t)+cos(4t))^2

expand

(cos (3 t) + cos (4 t))^{2}

cos^{2} (3 t) + 2 cos (3 t) cos (4 t) + cos^{2} (4 t)

Solution steps

(cos (3 t) + cos (4 t))^{2}

Apply Perfect Square Formula:

(a + b)^{2} = a^{2} + 2 ab + b^{2}

(cos (3 t) + cos (4 t))^{2} = cos^{2} (3 t) + 2 cos (3 t) cos (4 t) + cos^{2} (4 t)

= cos^{2} (3 t) + 2 cos (3 t) cos (4 t) + cos^{2} (4 t)

(cot (x) + tan (y)) (sin (x + y)) + sin (x - y)

\frac{d}{d x} ((x + 1) sin (x)) - x cos (x)

(e + e^{t})^{2} + (ln (t) + 1)^{2} + 4 t^{2}

\frac{( x ^{3} )}{( 2 ( x + 1 ) ^{2} )}

\frac{s ^{2}}{( x + 2 ) ( x + 3 )}

What is expand (cos(3t)+cos(4t))^2 ?
The solution to expand (cos(3t)+cos(4t))^2 is cos^2(3t)+2cos(3t)cos(4t)+cos^2(4t)