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5 votes
Find the exact value of sin 165° by using a sum or difference formula

User Corbell
by
5.3k points

2 Answers

3 votes

Answer:

The answer is B

Explanation:

User Dinya
by
4.6k points
3 votes

Answer: (√2 - √6)/4

Step-by-step explanation:

I am going to use the sum formula: sin(A + B) = sin A cos B + cos A sin B

Let's say A = 135° and B = 30°

sin(135° + 30°) = sin(135°) * cos(30°) + cos (135°) * sin(30°)

= (√2)/2 * 1/2 + (-√2)/2 * (√3)/2

= (√2)/4 + (-√6)/4

= (√2 - √6)/4

User Dba
by
6.0k points