Sin2a/ 2cosa; sin2a/sina; 2cos^2a/sin2a; cos^2a/sina+cosa.

Question

Sin2a/ 2cosa; sin2a/sina; 2cos^2a/sin2a; cos^2a/sina+cosa.

Answer 1

1). 2sinacosa/2cosa=sina
2). 2sinacosa/sina=2cosa
3). 2cos^2a/2sinacosa=cosa/sina=ctga
4).