Question

15. Ir cos AS
n=
then write the value of sinZA
5
III. Answer the following Questions
16. Show that (sine + cose) - (sin 8-cose) - 2 sin 28
17. Evaluate cos 225-sin225+tan495-C01495".
18. If tan (A+B) = 13 and tanA = 1then find B
19. IFA+B=45°. then prove that (1 + tanA)(1tan B)=2.
sin 2A
20. Show that
tan A
1 + cos2A
IV. Answer any THREE of the following questions.
21. Show that y2 + 2+ 2+2 cos 48 = 2 cos
2
22. Show that cosx.cos2x.cos.cosx-
sin (2x)
* sn 1
if sin x *0​

Answer 1

Answer:

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