Determine Which of the Following Are Trigonometric Identities $\frac { \sin ( y ) - \sin ( x ) } { \cos ( y ) + \cos ( x ) } + \frac { \cos ( y ) - \cos ( x ) } { \sin ( y ) + \sin ( x ) } = 0$

question 55

Multiple Choice

Determine which of the following are trigonometric identities.
I. $\frac { \sin ( y ) - \sin ( x ) } { \cos ( y ) + \cos ( x ) } + \frac { \cos ( y ) - \cos ( x ) } { \sin ( y ) + \sin ( x ) } = 0$
II. $\frac { \sin ( y ) + \sin ( x ) } { \cos ( y ) + \cos ( x ) } + \frac { \cos ( y ) + \cos ( x ) } { \sin ( y ) + \sin ( x ) } = 1$
III. $\frac { \sin ( y ) + \cos ( x ) } { \sin ( y ) \cos ( x ) } = \sin ( x ) + \cos ( y )$

• A) I is the only identity.
• B) II and II are the only identities.
• C) I, II, and III are identities.
• D) I and III are the only identities.
• E) II is the only identity.

Compute test statistics for hypothesis testing.

Set up and interpret rejection regions in hypothesis testing.

Understand and compute confidence intervals and their relation to hypothesis tests.

Understand the impact of sample size and standard deviation on test results.

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