Ask a Question

Proove that vii. sin^4 θ – cos^4 θ = 1 – 2 cos^2 θ

0 votes
96 views
in Trigonometry by (98.9k points)
edited

Proove that vii. \(sin^4 θ – cos^4 θ = 1 – 2 cos^2 θ\)

1 Answer

0 votes
by (98.9k points)
selected by
 
Best answer

image

Hence , prooved

Related questions

0 votes
1 answer 108 views
prove that cos^2 θ (1+ tan2 θ) = 1
asked Sep 30, 2021 in Trigonometry by Doubtly (98.9k points)
0 votes
1 answer 143 views
Prove That: Sec 4 a ( 1 − Sin 4 a ) − 2 Tan 2 a = 1
asked Sep 30, 2021 in Trigonometry by Doubtly (98.9k points)
0 votes
1 answer 315 views
If sin θ = 7/25, find the values of cos θ and tan θ.
asked Sep 30, 2021 in Trigonometry by Doubtly (98.9k points)

Doubtly is an online community for engineering students, offering:

  • Free viva questions PDFs
  • Previous year question papers (PYQs)
  • Academic doubt solutions
  • Expert-guided solutions

Get the pro version for free by logging in!

Most popular tags

jeemain geography-10th engineering physics semester 5 web computing

5.7k questions

5.1k answers

108 comments

557 users

Doubtly
...