Math, asked by keerthanaharini, 5 months ago

evaluate: explain in..​

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Answered by Dynamicarmies
3

= > \frac{cos35}{sin55}  + \frac{sin12}{cos78}  - \frac{cos18}{sin72}

= > \frac{cos(90 - 55)}{sin55}   +\frac{sin (90-78)}{cos78} -\frac{cos(90-72)}{sin72}

= > \frac{sin55}{sin55} +\frac{cos78}{cos78} -\frac{sin72}{sin72}                                    [cos(90-\alpha ) = sin\alpha ]

= > 1 + 1 - 1 = 1

Answered by pokemon9935
0

Answer:

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