verify:cos(4x)=1-sin squared (2x)-4 (sin x cos x)squared

please shoe the answer.
in Trigonometry Answers by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

cos(4x)≡1-2sin2(2x)=1-sin2(2x)-sin2(2x).

sin(2x)≡2sin(x)cos(x); sin2(2x)≡4(sin(x)cos(x))2.

cos(4x)≡1-sin2(2x)-4(sin(x)cos(x))2.

by Top Rated User (1.2m points)

Related questions

1 answer
verify that (sin x +cos x) squared=1+sin(2x)
asked Aug 19, 2013 in Trigonometry Answers by anonymous | 617 views
1 answer
how much did each type of ticket cost?
asked Mar 30, 2020 in Word Problem Answers by anonymous | 621 views
1 answer
1.2kg of bananas cost $2.88.How much would 1.1kg cost?
asked Nov 16, 2017 in Algebra 1 Answers by DIFGHLL | 534 views
1 answer
Determine the value of x
asked Oct 27, 2017 in Algebra 2 Answers by Les | 408 views
2 answers
3•(-9)+(-2)•(7)
asked Sep 18, 2014 in Other Math Topics by pemdas | 843 views
1 answer
If 17 minus s over four is -10 what is s
asked Sep 11, 2013 in Algebra 1 Answers by Jorge barrera | 672 views
1 answer
graph of a prportional relationship
asked Mar 5, 2013 in Algebra 1 Answers by anonymous | 564 views
1 answer
how may times does 5 go into 204
asked Sep 20, 2012 in Algebra 1 Answers by anonymous | 804 views
1 answer
Verify sin(x+y)cos(x-y)=sin(x)cos(x)+sin(y)cos(y)
asked Mar 15, 2013 in Trigonometry Answers by anonymous | 730 views
1 answer
verify 3 - 5sin^2 x= cos^2x+2cos2x
asked Dec 10, 2015 in Trigonometry Answers by anonymous | 667 views
1 answer
how to verify this identity (cscx/1+cscx)=1-sinx/Cos^2x
asked Dec 7, 2012 in Trigonometry Answers by anonymous | 1.5k views
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!

Most popular questions within the last 3000 days

  1. 50+50-25X0+2+2= (19)
  2. it takes 10 road workers 5 days to complete a road repair when working 2 hours a day.Working at the same pace,how many days will it take 2 people working 5 hours a day to finish it? (3)
  3. Solve 15 -1(12÷4+1)? (4)
  4. 8:4(5+2) (3)
  5. How can i represent 1/3; 3/3; 7/3; 10/3 and 15/3 on a number line? (1)

Most popular tags

87,516 questions
100,285 answers
2,420 comments
736,120 users