Simplify the expression by using a sum or difference identity.
-cos (13°) cos(87°) + cos(-77°) sin(-87°)
A) cos 100°
B) 1
C) 0
D) sin 100°
Correct Answer:
Verified
Q253: Simplify the expression by using a sum
Q254: Use trigonometric identities to find the exact
Q255: Simplify the expression by using a sum
Q256: Simplify the expression by using a sum
Q257: Use trigonometric identities to find the exact
Q259: Simplify the expression by using a sum
Q260: Use trigonometric identities to find the exact
Q261: Use an appropriate identity to find the
Q262: Use an appropriate identity to find the
Q263: Use an appropriate identity to find the
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents