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

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

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

expand

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

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

Solution steps

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

Apply Perfect Square Formula:

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

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

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

(1 - 3 y i)^{2}

3 (x + Δ x)

P (- 2, - 3) Q (3, 4)

(- e^{- t} cos (t) - e^{- t} sin (t))^{2}

lo g_{10} (x^{3} y^{- 4})

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