Register

Sin pi/4sinpi/6 = 1/2[__pi/12-cos5pi/12]

Sin pi/4sinpi/6 = 1/2[__pi/12-cos5pi/12]
43.2k views
2 votes
Sin pi/4sinpi/6 = 1/2[__pi/12-cos5pi/12]

User Kelvin Tan
by
8.0k points

1 Answer

4 votes

Answer:

Explanation:

2 sin a sin b=cos(a-b)-cos (a+b)


2 sin (\pi )/(4) sin (\pi )/(6)=cos ((\pi )/(4)-(\pi )/(6))-cos ((\pi )/(4) +(\pi )/(6) )\\=cos ((3 \pi-2 \pi )/(12) )-cos ((3 \pi+2\pi)/(12) )\\=cos ((\pi )/(12) )-cos( (5 \pi)/(12) )\\sin ( \pi)/(4) sin\frac {\pi}{6}=(1)/(2)[cos (\pi)/(12) -cos (5 \pi)/(12) ]

User Merr Leader
by
8.4k points
← Prev Question Next Question →

Related questions

User Miller
asked Jun 3, 2024 206k views
Cos pi/4 cos pi/6=1/2(__pi/12+cos5pi/12) Fill in the ___
Miller asked Jun 3, 2024
by Miller
8.4k points
1 answer
5 votes
206k views
User Eksapsy
asked Mar 13, 2024 180k views
Cos5pi/3 = A. 3/2 B.1/2 C. 2/2 D.-2/2 HELPP
Eksapsy asked Mar 13, 2024
by Eksapsy
8.3k points
2 answers
0 votes
180k views
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Other Questions

How do you can you solve this problem 37 + y = 87; y =
How do you estimate of 4 5/8 X 1/3
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement  how thick must the cement be to cover field
Write words to match the expression. 24- ( 6+3)
A dealer sells a certain type of chair and a table for $40. He also sells the same sort of table and a desk for $83 or a chair and a desk for $77. Find the price of a chair, table, and of a desk.
Link Copied!