Sum and Difference Identities

Question 1

Which sum or difference identity could be used to prove that sin(π + q) = -sin q is an identity?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/evresources//42497012_q3_d.jpg

Question 2

Assume that and . Find the exact value of if and . a.c.b.d.

Revolt · Accepted Answer

C

Question 3

Find the exact value of .a.c.b.d.

Revolt · Accepted Answer

B

Question 4

If a and b are the measures of two first quadrant angles and sin a = and sin b = , find sin (a + b).a.b.c.d.

Revolt · Accepted Answer

A

Question 5

Which sum or difference identity could be used to prove that is an identity?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/evresources//42497011_q2_b.jpg

Question 6

Assume that and . Find the exact value of if and . a.c.b.d.

Revolt · Accepted Answer

C

Question 7

Find the exact value of .a.c.b.d.

Revolt · Accepted Answer

B

Question 8

What is the exact value of tan 105°?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/evresources/42496961_tan_a.jpg

Question 9

What is the exact value of sin 15°?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/evresources/42496932_answer_b_revised.jpg

Question 10

Find the exact value of .a.c.b.d.

Revolt · Accepted Answer

A

Sum and Difference Identities Answers