Math, asked by rumi20, 1 year ago

Without using trigonometric table evaluate (sin 65/ cos 25 ) + (cos 32/ sin 58) - sin 28 * sec 62 + cosec 2 30

Answers

Answered by abhi569
25
( \frac{sin65}{cos25} )+ ( \frac{cos32}{sin58}) - sin28sec62 + cosec^2 30

⇒  (\frac{sin( 90 - 25)}{cos25}) + ( \frac{cos(90 - 58)}{sin58} - sin(90 - 62)sec62 + cosec^2 60

⇒  \frac{cos25}{cos25}  +  \frac{sin58}{sin58} - cos62sec62 + ( \frac{2}{ \sqrt{3} })^2

⇒ 1 + 1  -  \frac{1}{sec62}* sec62 +  \frac{4}{3}

⇒ 1 + 1 - 1 +  \frac{4}{3}

⇒ 1 +  \frac{4}{3}

  \frac{3 + 4}{3}

⇒  \frac{7}{3}



i  hope this will help you


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