Solved

Simplify the Expression and Enter the Answer in Terms of Sine

Question 19

Multiple Choice

Simplify the expression and enter the answer in terms of sine and cosine. $( \sec B + \tan B ) ( \sec B - \tan B )$

A) $\sec ^ { 2 } B + \tan ^ { 2 } B$
B) $- 2 \cos B \sin B$
C) $0$
D) $1$
E) $1 - \cos ^ { 2 } B$

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