What is the single percentage discount equivalent to two successive discounts of 15% and 5%?
If sec²A + tan²A = \( \frac{4}{17} \), then sec4A - tan4A is equal to:
\( \frac{13}{17} \)
\( \frac{4}{13} \)
\( \frac{4}{17} \)
\( \frac{5}{17} \)
If sin(A + B) = cos(A + B), what is the value of tan A?
\(\, \frac{1 - \tan B}{1 + \tan B} \)
\(\, \frac{1 + \tan B}{1 - \tan B} \)
\(\, \frac{1 + \sec B}{1 - \sec B} \)
\(\, \frac{1 - \mathrm{cosec}\,B}{1 + \mathrm{cosec}\,B} \)