(tan (t)- sin (t))/2tan(t)=sin^2 (t/2)

please help
in Trigonometry Answers by Level 1 User (120 points)

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(t)=1-2sin2(t/2), so sin2(t/2)=(1-cos(t))/2.

(tan(t)-sin(t))/2tan(t)=½-cos(t)/2=(1-cos(t))/2=sin2(t/2) QED

by Top Rated User (1.1m points)

Related questions

2 answers
tell whether f(X) = sin is an identity
asked Apr 27, 2013 in Trigonometry Answers by anonymous | 992 views
1 answer
(1+cosx)tanx/2 = sinx
asked Dec 7, 2012 in Trigonometry Answers by anonymous | 922 views
1 answer
2tan 30 / 1-tan2 30
asked Sep 13, 2012 in Trigonometry Answers by anonymous | 872 views
1 answer
(sin(x)cos(x))/(cos^2(x))-(sin^2(x))=(tan(x))/(1-tan^2(x))
asked Mar 29, 2012 in Trigonometry Answers by anonymous | 1.0k views
1 answer
(cos x + cot x)/(tan x+ sin x)=(csc x cot x)
asked Mar 4, 2012 in Trigonometry Answers by anonymous | 1.2k views
1 answer
solve (1/2)*2tan 2x + sin x
asked Oct 15, 2013 in Trigonometry Answers by max | 556 views
2 answers
sec^4x(1-sin^4x)-2tan^2x=1
asked Jul 2, 2013 in Trigonometry Answers by anonymous | 1.6k views
1 answer
Verify (1/sin t -1) + (1/sin t + 1)= -2 tan t sec t
asked Apr 23, 2013 in Trigonometry Answers by anonymous | 2.7k views
0 answers
(tan v +sec v)/sec v - (tan v +sec v)/tan v=-cosvcotv
asked Mar 4, 2012 in Trigonometry Answers by anonymous | 580 views
1 answer
(a tan u +b)^2 + (b tan u -a)^2=(a^2+b^2)sec^2u
asked Mar 4, 2012 in Trigonometry Answers by anonymous | 1.3k views
2 answers
(cos x ÷ 1- sin x) - tan x= 1÷ cosx
asked Mar 2, 2017 in Trigonometry Answers by pertunia | 766 views
1 answer
Verify 1+sec(-x)/sin(-x)+tan(-x)=-csc x
asked Oct 27, 2016 in Trigonometry Answers by anonymous | 1.4k 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. complete the following. 825 use each digit once .make the two smallest 3 digit numbers and two largest 3-digit number (2)
  4. Solve 15 -1(12÷4+1)? (4)
  5. 8:4(5+2) (3)

Most popular tags

87,550 questions
99,628 answers
2,417 comments
439,893 users