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Question 53
If $$sin^{4} A - cos ^{4} A = 1 then \frac{A}{2}$$ then $$\frac{A}{2}$$ in Degrees is $$(0< A \leq 90^{0}$$
Solution
The correct option is B
Check by options.Â
If $$\frac{A}{2}$$ = $$45^\circ$$ Â $$\Rightarrow$$ A = $$90^\circ$$
And A= $$90^\circ$$ Satisfies the given equation.
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