kellerpaula kellerpaula
  • 22-03-2020
  • Mathematics
contestada

Trigonometry
Angle Sum and Difference, Double Angle and Half Angle Formulas
Find the exact value of:
Cos 20* cos 45* + sin 20* sin 45*

Respuesta :

amna04352
amna04352 amna04352
  • 22-03-2020

Answer:

cos(25)

Step-by-step explanation:

cosAcosB + sinAsinB = cos(A-B)

cos(20)cos(45) + sin(20)sin(45)

= cos(20-45) = cos(-25)

= cos(25) or 0.906

Answer Link

Otras preguntas

Can someone answer this please I don’t understand
write an informative speech about MODULAR DISTANCE LEARNINGSANA PO MAAYOS PO UNG SAGOT NYO NEED PO ASAP​
I roll a standard six-sided die 6 times in a row. What is the probability that the numbers alternate between odd and even? Help ASAP
The rate of change is constant in each table. Find the rate of change. Explain what the rate of change means for the situation Time (days):3,4,5,6 cost($):7
what is 2 plus 2 plus 3 plus 3 plus 5
ways of transmission of coronavirus from infected person to others?
How many solutions y=10x+2 y=8x+2x+2
3. (05.02 LC)The lengths of two sides of a triangle are 10 inches and 4 inches. Which of the following dimensions is the third side of this triangle? (5 points)
What is 3 fifth of 100
what is the deference between Sexual and asexual reproduction on the number of individuals involved​