What is the value of $sin^2 60 +tan^2 45 + sec^245 - cosec^2 30$ ?
Answer & explanation
Correct answer: option 3
sin² 60º + tan² 45º + sec² 45º - cosec² 30º
= ( \(\frac{ √3 }{2}\) )² + 1 + ( √2 )² - ( 2 )²
= ( \(\frac{ 3 }{4}\) ) - 1
= - \(\frac{ 1 }{4}\)