Question

please answer the question​

Answer 1

Answer:

given, 4( sin²60 + cos²45 ) - 2( sec²60 + cosec²45 )

note => sin60 = √3/2 , cos45 = 1/√2 , sec60 = 2 , cosec45 = √2

=> 4( sin²60 + cos²45 ) - 2( sec²60 + cosec²45 )

= 4 [ (√3/2)² + (1/√2)² ] - 2[ (2)² + (√2)² ]

= 4 [ 3/4 + 1/2 ] - 2[ 4 + 2 ]

= 4 ( 5/4) - 2(6)

= 5 - 12

= -7