8. Express the product sin30 cos50 as a sum. 1/2 (sin80-sin20) 1/2 (sin80+sin20) sin80-sin20 sin80+sin20)
8. Express the product sin30 cos50 as a sum. 1/2 (sin80-sin20) 1/2 (sin80+sin20) sin80-sin20 sin80+sin20)
Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE:
1. Give the measures of the complement and the supplement of an angle measuring 35°.
Related questions
Question
pls answer no.8
![8. Express the product sin30 cos50 as a
sum.
O 1/2 (sin80-sin20)
O 1/2 (sin80+sin20)
sin80-sin20
sin80+sin20)
9. Write the product 2 sin(2Tt/9)
cos(T/9) as a sum of function values.
sin(Tt/3)+sin(t/9)
sin(Tt/3)-sin(t/9)
2 sin(t/9)-cos(T/9)
2sin(T/9)+cos(t/9)
10. Express cos55°cos45° as a sum.
O 1/2 (cos100°+ cos10°)
O 2 (sin100°- sin10°)
sin100°+ cos10°
-2 (sin50°+ cos10°)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbeb8cab2-97f6-451b-b913-40024f68edd1%2F3798dba3-5b6b-46f2-9d5e-875b2b878eb7%2Fe460nfk_processed.jpeg&w=3840&q=75)
Transcribed Image Text:8. Express the product sin30 cos50 as a
sum.
O 1/2 (sin80-sin20)
O 1/2 (sin80+sin20)
sin80-sin20
sin80+sin20)
9. Write the product 2 sin(2Tt/9)
cos(T/9) as a sum of function values.
sin(Tt/3)+sin(t/9)
sin(Tt/3)-sin(t/9)
2 sin(t/9)-cos(T/9)
2sin(T/9)+cos(t/9)
10. Express cos55°cos45° as a sum.
O 1/2 (cos100°+ cos10°)
O 2 (sin100°- sin10°)
sin100°+ cos10°
-2 (sin50°+ cos10°)
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