English, asked by noorjahan72520, 6 months ago

sin 25 cos 65 + cos 25 son 65

Answers

Answered by Anonymous

2

Answer:

sin(90-25).cos65+cos(90-65).sin65

=sin(90-A)= cosa and cos(90-A)= SinA

cos65.cos65+ sin65.sin65

= cos²65+sin²65=1

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