menu
Qammunity.org
Login
Register
My account
Edit my Profile
Private messages
My favorites
Ask a Question
Questions
Unanswered
Tags
Categories
Ask a Question
Prove that: sin80 -COS110=√3sin50
asked
Dec 21, 2020
169k
views
1
vote
Prove that:
sin80 -COS110=√3sin50
Mathematics
middle-school
Zaan
asked
by
Zaan
7.6k
points
answer
comment
share this
share
0 Comments
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1
Answer
3
votes
Answer:
Hence Proved
Explanation:
To Prove that
Sin 80 - Cos 110 =
× Sin 50
Cos 90+∅ = -Sin ∅
Sin 80 - Cos 90+20 =
× Sin 50
Sin 80 -(-Sin 20) =
×Sin 50
Sin 80 + Sin 20 =
×Sin50
Sin A +Sin B = 2Sin (A+B)/2Cos(A-B)/2
2Sin (80+20)/2Cos (80-20)/2 =
×Sin50
2Sin 50Cos 30 =
×Sin50
Cos 30 =
/2
2×
/2×Sin50 =
×Sin50
×Sin50 =
×Sin50
Hence proved
Neil Essy
answered
Dec 25, 2020
by
Neil Essy
7.9k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
Related questions
asked
Aug 9, 2023
76.9k
views
Use the sum and difference identities to determine the exact value of the following expression. If the answer is undefined, write DNE.cos110 cos25 - sin1 10 sin25
Duane J
asked
Aug 9, 2023
by
Duane J
8.0k
points
Mathematics
college
1
answer
3
votes
76.9k
views
asked
May 27, 2024
59.7k
views
I need to find the value of "q" in the equation (q/sin30) = (10.0/sin80). Options: A) q = 5.77 B) q = 0.5 C) q = 7.87 D) q = 3.87
Ana
asked
May 27, 2024
by
Ana
8.2k
points
Mathematics
high-school
1
answer
1
vote
59.7k
views
asked
May 25, 2017
54.4k
views
Sin10+sin20+sin40+sin50=sin70+sin80.prove it
Casey Robinson
asked
May 25, 2017
by
Casey Robinson
7.9k
points
Mathematics
high-school
1
answer
4
votes
54.4k
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 =
What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
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.
Twitter
WhatsApp
Facebook
Reddit
LinkedIn
Email
Link Copied!
Copy
Search Qammunity.org