A) \[1\]
B) \[\frac{1}{2}\]
C) \[2\]
D) \[3\]
Correct Answer: A
Solution :
(a): \[\sin A=1-{{\sin }^{2}}A={{\cos }^{2}}A\] \[\Rightarrow \] \[{{\cos }^{2}}A+{{\cos }^{4}}A={{\cos }^{2}}A+{{\sin }^{2}}A=1\]You need to login to perform this action.
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