Question

Evaluate 7sin square 30cosec square 60-cot square 45

Answer 1

7 sin^2 30 cosec^2 60 - cot ^2 45

= 7(1/4)(4/3)-1

=(7/3)-1

= 4/3

Hope this helps!

Answer 2

7sin²30 cosec²60 - cot²45
= 7× (1/2)² (2/(√3))² - 1
= 7 × 1/4 × 4/3 - 1
= 7 × 1/3 - 1
= 7/3 - 1
= 4/3