What is 7cos^2(7x)-7sin^2(7x) ?

The solution to 7cos^2(7x)-7sin^2(7x) is 7cos(14x)

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simplify 7cos^2(7x)-7sin^2(7x)

simplify

7 cos^{2} (7 x) - 7 sin^{2} (7 x)

7 cos (14 x)

Solution steps

7 cos^{2} (7 x) - 7 sin^{2} (7 x)

Rewrite using trig identities

= 7 cos (14 x)

5 (x + 1)^{2} - 3

(3 x^{2} - 5 x + 3) (x^{2} - 2 x - 1)

(43)^{3}

(- 41) + (- 40)

6.023 \cdot 1 0^{23}

What is 7cos^2(7x)-7sin^2(7x) ?
The solution to 7cos^2(7x)-7sin^2(7x) is 7cos(14x)