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In this lesson, we will learn how to identify equivalent angles of sine, cosine, and tangent using cofunction identities.

Q1:

Using the fact that c o s s i n π = ( 9 0 β π ) β , which of the following is equivalent to c o s 3 5 β ?

Q2:

Which of the following is equivalent to c o s 4 0 β ?

Q3:

Which of the following is equivalent to s i n 2 3 β ?

Q4:

Which of the following is equal to β π s i n ?

Q5:

Which of the following is equal to β π c o s ?

Q6:

Which of the following is equivalent to s i n 6 0 β ?

Q7:

Simplify t a n ( 3 6 0 β π ) β .

Q8:

Simplify t a n ( 9 0 + π ) β .

Q9:

Which of the following is equal to c o s π ?

Q10:

Simplify t a n ( 2 7 0 + π ) β .

Q11:

Simplify t a n ( 1 8 0 β π ) β .

Q12:

Simplify c o s ( 9 0 β π ) β .

Q13:

Simplify c o s ( 3 6 0 β π ) β .

Q14:

Simplify t a n ( 2 7 0 β π ) β .

Q15:

Which of the following is equivalent to c o s 3 3 β ?

Q16:

Which of the following is equivalent to s i n 8 0 β ?

Q17:

Simplify c o s ( 9 0 + π ) β .

Q18:

Simplify c o s c o s π + ( 1 8 0 β π ) β .

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