Q.13 Given \( 0 \leq \theta \leq 2 \pi \), the number of possible solutions satisfying the equation \( 8 \cos ^{6} 2 \theta-7 \c

Q.13 Given \( 0 \leq \theta \leq 2 \pi \), the number of possible solutions satisfying the equation \( 8 \cos ^{6} 2 \theta-7 \cos ^{3} 2 \theta-1=0 \), is (1) 5 (2) 6 (3) 7 (4) 8

Q.13 Given \( 0 \leq \theta \leq 2 \pi \), the number of possible solutions satisfying the equation \( 8 \cos ^{6} 2 \theta-7 \cos ^{3} 2 \theta-1=0 \), is (1) 5 (2) 6 (3) 7 (4) 8

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