Evaluate: cos 48º -sin 42º
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Ahoy,
cos48°-sin42°
=>sin(90°-48°) - sin 42°
=> sin42°-sin42°
=> 0
Identity used :- cosA = sin(90°-A)
Cheers!
cos48°-sin42°
=>sin(90°-48°) - sin 42°
=> sin42°-sin42°
=> 0
Identity used :- cosA = sin(90°-A)
Cheers!
Answered by
1
i think it will help you
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