sin 25º cos 65° + cos 25° sin 65°
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Answered by
5
Step-by-step explanation:
Do you know about 90-theta theorem
If yes you will understand my answer
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Answered by
7
Step-by-step explanation:
sin 25º cos (90° - 25º) + cos 25° sin (90° - 25º)
= sin 25º sin 25º + cos 25° cos 25°
= sin^2 25º + cos^2 25°
= 1
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