Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\frac { \sec 16 A - 1 } { \sec 8 A - 1 } = \frac { \tan 16 A } { \tan 4 A }$$

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