Currently studying for my Private License. I did a sample exam and one of the questions was, what is the new stall speed of an aircraft in a given bank angle with straight and level flight stall speed provided. Eg. *50kts straight and level stall speed, if you are in a 30* banked coordinated turn, what is the new increased stall speed?*

My question is, how do I calculate the load factor of the aircraft in banked, coordinated flight?

I know that Load Factor = 1/cos Bank Angle

and Stall Speed banked = Stall Speed Level / Square Root of cos Bank Angle

How do I calculate 'cos'? If I can easily find what 'cos' is then ill be sorted! I can't find a SIMPLE put way of finding or calculating 'cos'

Assistance is appreciated. Thanks

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