1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
liubo4ka [24]
3 years ago
15

Write the expression as either the sine, cosine, or tangent of a single angle. (2 points)

Mathematics
1 answer:
sattari [20]3 years ago
8 0

Answer:

cos(π/3)cos(π/5) + sin(π/3)sin(π/5) = cos(2π/15)

Step-by-step explanation:

We will make use of trig identities to solve this. Here are some common trig identities.

Cos (A + B) = cosAcosB – sinAsinB

Cos (A – B) = cosAcosB + sinAsinB

Sin (A + B) = sinAcosB + sinBcosA

Sin (A – B) = sinAcosB – sinBcosA

Given cos(π/3)cos(π/5) + sin(π/3)sin(π/5) if we let A = π/3 and B = π/5, it reduces to

cosAcosB + sinAsinB and we know that

cosAcosB + sinAsinB = cos(A – B). Therefore,

cos(π/3)cos(π/5) + sin(π/3)sin(π/5) = cos(π/3 – π/5) = cos(2π/15)

You might be interested in
What type of expense is a toll
Romashka-Z-Leto [24]

Answer:

The IRS considers them to be part of your employee business expenses, which fall under the category of miscellaneous deductions. Add the cost of tolls, parking, your other car expenses to your other employee business expenses and combine that amount with other miscellaneous expenses.

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
If the original price of a table is p in the sale price of the table is p subtracted by 0.2 P which other expression represents
FrozenT [24]
Guy yygghvftthbnnxsthjcsrjkncstikvsrhuuuuuuuuuuuuuuuuuujjjjj
7 0
3 years ago
Rovan can make 48 tarts per hour. complete the table below:
GarryVolchara [31]

Answer:

A.) in 6 hours Rovan can make 288 tarts

B. at this rate it'll take Rovan about 2 and a half hours to make 120 tarts

Step-by-step explanation:

so if Rovan can make 48 tarts an 1 hour take 48 and multiply it by the hours to find out how many tarts he can make

48 x 1 =48

48 x 2 =96

48 x 3 =144 .....

48 x 6 =288

A.) in 6 hours Rovan can make 288 tarts

B. at this rate it'll take Rovan about 2 and a half hours to make 120 tarts

3 0
3 years ago
Read 2 more answers
Samantha plays a trivia game. She earns 3 points for each
Rudiy27

この質問は緒と面白いね

11x3=33

33-4x0.75=30

頑張ってね!

5 0
2 years ago
How many kilometers can that tortoise walk in 1 hour
vfiekz [6]
5 kilometers

Jjjjjjkkkk
6 0
3 years ago
Other questions:
  • Help NEEDED please! Mark BRAINLIEST
    5·1 answer
  • Can I please have help!!!
    9·1 answer
  • What dose ARM stand for
    13·2 answers
  • Simplify 3x^5 times 5x^3<br> can someone help please
    9·1 answer
  • Evaluate the expression. 6x 12y + 5 + 2y +8 what is the coefficient of y? What is the constant? (Show work)
    14·1 answer
  • Donny joined a club that costs $40 per month. Is the cost over time a proportional or non-proportional relationship?
    15·1 answer
  • Y= 2x + 7 (List 4 Ordered Pairs for the equation) 1 points each
    14·1 answer
  • Mrs. Siroj is reading a novel for her book
    6·1 answer
  • Help!! I’ve been Stuck on this last problem
    10·1 answer
  • What is 150% of 2/3km
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!