Question

sec² 45⁰ - cot² 45⁰- sin² 30⁰- sin² 60⁰​

Answer 1

sec²45 - cot²45 - sin²30 - sin²60

$= { (\sqrt{2} )}^{2} - {(1)}^{2} - { (\frac{1}{2} )}^{2} - {( \frac{ \sqrt{3} }{2}) }^{2} \\ = 2 - 1 - \frac{1}{4} - \frac{3}{4} \\ = 1 - \frac{4}{4} \\ = 1 - 1 = 0$

Answer 2

Step-by-step explanation:

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