What is factor cos(6x+9y)+cos(6x-9y) ?

The solution to factor cos(6x+9y)+cos(6x-9y) is cos(3(2x+3y))+cos(3(2x-3y))

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factor cos(6x+9y)+cos(6x-9y)

factor

cos (6 x + 9 y) + cos (6 x - 9 y)

cos (3 (2 x + 3 y)) + cos (3 (2 x - 3 y))

Solution steps

cos (6 x + 9 y) + cos (6 x - 9 y)

Factor

6 x + 9 y : 3 (2 x + 3 y)

= cos (3 (2 x + 3 y)) + cos (6 x - 9 y)

Factor

6 x - 9 y : 3 (2 x - 3 y)

= cos (3 (2 x + 3 y)) + cos (3 (2 x - 3 y))

2 \cdot 32

z^{2} + (3 - i) z - 3 i

2 e^{10} - 2 e^{2}

A (3.2)

A (3.5)

What is factor cos(6x+9y)+cos(6x-9y) ?
The solution to factor cos(6x+9y)+cos(6x-9y) is cos(3(2x+3y))+cos(3(2x-3y))