If sin A=¾, calculate cos A and tan A.

1.	If sin A=¾, calculate cos A and tan A.
Answer» S o l u t i o nGiven\xa0sinA=3/4Or p/h=3/4Let p=3k and h=4kNow By Pythagoras theoremp2\xa0+ b2\xa0=h29k2\xa0+ b2\xa0=16k2b2\xa0= 7k2Or b=+k√7Now\xa0CosA=b/h=√7/4Now\xa0tanA=SinA/CosA=3/√7

Discussion