If A = 30°, verify the following
![cos \: a= \sqrt[]{1 + cos 2 \: a \div 2}](https://tex.z-dn.net/?f=++cos+%5C%3A+a%3D+%5Csqrt%5B%5D%7B1+%2B+cos+2+%5C%3A+a+%5Cdiv+2%7D+ "cos \: a= \sqrt[]{1 + cos 2 \: a \div 2}")
urgent h
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Answer:
answer is root 3= root 5
Step-by-step explanation:
Sub the value of cos in both Lhs and Rhs
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