Express sin 81° + tan 81° in terms of trigonometric ratios of angles between 0° and 45°.
Answers
Answered by
139
sin 81° = sin (90-9)
= cos9°
tan 81° = tan (90-9)
= cot 9°
=> sin 81° + tan 81° = cos 9° + cot 9°
= cos9°
tan 81° = tan (90-9)
= cot 9°
=> sin 81° + tan 81° = cos 9° + cot 9°
Answered by
141
Hey there!
We can do so by using complementary angles.
sin81
= sin(90-9)
= cos9
tan81
= tan ( 90-9)
= cot 9
sin 81° + tan 81°= cos9°+ cot9°
hope helped!
We can do so by using complementary angles.
sin81
= sin(90-9)
= cos9
tan81
= tan ( 90-9)
= cot 9
sin 81° + tan 81°= cos9°+ cot9°
hope helped!
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