A) \[a\alpha +b\beta ={{b}^{2}}+{{\alpha }^{2}}\]
B) \[2(a\alpha +b\beta )={{b}^{2}}+{{\alpha }^{2}}\]
C) \[a\alpha +b\beta ={{a}^{2}}+{{b}^{2}}\]
D) None of these
Correct Answer: B
Solution :
Apply \[{{({{C}_{1}}{{C}_{2}})}^{2}}=r_{1}^{2}+r_{2}^{2}\] or\[2{{g}_{1}}{{g}_{2}}+2{{f}_{1}}{{f}_{2}}={{c}_{1}}+{{c}_{2}}\].You need to login to perform this action.
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