Solved

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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