jtkgotosleep123 jtkgotosleep123

01-12-2020
Mathematics

contestada

what is the exact value of cos(11pi/21)cos(pi/7)-sin(11pi/21)sin(pi/7)?

a. -squr3/2
b. -1/2
c. 1/2
d. squr3/2

Respuesta :

funnymunchies2004 funnymunchies2004

07-12-2020

Answer:

B

Step-by-step explanation:

-1/2

Answer Link

camjjwo camjjwo

12-06-2021

Answer:

B -1/2

Step-by-step explanation:

Answer Link

Otras preguntas

All of the following are types of lyric poetry except; A. tankas. B. ballads. C. sonnets. D. madrigals.

in a parallelogram one angle is 9 times the size of another. find the measures of the angles

Compute the value of the discriminant and give the number of real solutions to the quadratic equation: 3x^2 - 7x + 9 = 0

Describe a pattern in the sequence of numbers. Predict the next number. 1) 1, 2, 6, 24, ___ 2) 0, 3, 8, 15, 24, ___

Earth is a close approximation of a natural closed system. What are some ways that living in a closed system affects each of us.

Which expression can be used to change 75 kilometers per hour to meters per minute?

What number is equivalent to 13/2

where did japan first expand its empire after 1930

Where did the Greeks believe that most gods lived

Add these fractions (Lowest Terms) a) 1/6 + 1/6 b) 1/4 + 3/8 c) 2/3 + 5/6 d) 9/21 + 4/7 e) 1 3/5 + 1/10 f) 1 1/4 + 11/12 g) 1 2/3 + 2/3 h) 1 5/6 + 3 2/5