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`        (Sin70° + Cos40°)/(Cos70°+Sin40°) what is the value ?`
2 years ago

```							Dear Tanuja (sin 70 + cos 40) / (cos 70 + sin 40) = (sin 70 + sin 50) / (cos 70 + cos 50) = (sin(60+10) + sin(60-10)) / (cos(60+10) + cos(60-10)) = 2sin60cos10/(2cos60cos10) = tan60 = sqrt 3  RegardsArun (askIITians forum expert)
```
2 years ago
```							(sin70 + cos40) / (cos70+sin40)= sin70 + cos(90-50) / cos70 + sin(90-50)= (sin70 + sin50) / (cos70 + cos 50)= (2sin60×cos20) / (2cos60×cos20)= 2sin60 / 2cos60= sin60/cos60= tan60√3
```
one year ago
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