Use the Cofunction Identities to Evaluate the Expression Below Without $\frac { 1 } { 2 }$

question 36

Multiple Choice

Use the cofunction identities to evaluate the expression below without using calculator. sin²20° + sin²27° + sin²70° + sin²63°

• A)1
• B) \(\frac { 1 } { 2 }\)
• C)-1
• D)?0
• E)2

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Definitions:

Test Statistic

A value calculated from sample data that is used in statistical hypothesis testing to determine whether to reject the null hypothesis.

Correlation Coefficient

A measure indicating the extent to which two variables change together, ranging from -1 to 1.

One-tailed Test

A hypothesis test in which the values for which we can reject the null hypothesis are located entirely in one tail of the probability distribution.

Two-tailed Test

A statistical hypothesis test in which the area of rejection is on both tails of the normal distribution, testing for the possibility of both positive and negative differences.