## Question

###### Solve the following equations and tick the correct one.The real roots of the equation $cos ^{7} x+sin ^{4} x=1$ in $(-pi, pi)$ are(a) $-frac{pi}{2}, 0$(b) $-frac{pi}{2}, 0, frac{pi}{2}$(c) $0, frac{pi}{2}$(d) $0, frac{pi}{4}, frac{pi}{2}$

Solve the following equations and tick the correct one. The real roots of the equation $cos ^{7} x+sin ^{4} x=1$ in $(-pi, pi)$ are (a) $-frac{pi}{2}, 0$ (b) $-frac{pi}{2}, 0, frac{pi}{2}$ (c) $0, frac{pi}{2}$ (d) $0, frac{pi}{4}, frac{pi}{2}$

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