its from sample papers

asked Jul 8, 2016 in Trigonometry Answers by Srijan

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

Consider right-angled triangle ABC where B=90 degrees. If A=37 then C=53. BC=x and AB=1, AC=√(1+x^2). sin37=x/√(1+x^2), cos37=1/√(1+x^2).

cosec53=1/sin53=1/cos37=√(1+x^2), so cosec^2(53)=1+x^2.

answered Jul 8, 2016 by Rod Top Rated User (486,860 points)
Welcome to, 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!
79,816 questions
83,630 answers
66,548 users