Question

sec² 45o - cot² 45o - sin² 30o - sin² 60o​

Answer 1

Answer:

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Answer 2

Answer:

$\huge\mathfrak\purple{solution}$

${sec}^{2}45 - {cot}^{2}45 - {sin}^{2}30 - {sin}^{2}60\\ \\{\sqrt {2}}^{2} - {1}^{2} - {(\frac{1}{2})}^{2} - {\frac{\sqrt{3}}{2}}^{2}\\ \\= 2 - 1 -\frac{1}{4} - \frac{3}{4}\\ \\ =\frac{8 - 4 - 1 - 3 }{4} \\ \\ = \frac{0}{4} \\ \\ = 0$