Math, asked by asgarmiyan1, 7 months ago

17. (i) sin 65º. cos 38° = cos 25°. sin 52°
(ii) sin 25°. sin 65º = cos 25º. cos 65°

Answers

Answered by mathdude500

8

Answer:

sin65. cos38

= sin(90 - 25). cos(90 - 52)

= cos25. sin52

hence proved.

sin25. sin65

= sin(90 - 65). sin(90 - 25)

= cos65. cos25

hence proved

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