Question

Please solve question 12

Answer 1

hope it will help you

Answer 2

Given : cosec^2 30 - sin^2 45 - sec^2 60.

$= > (2)^2 - (\frac{1}{\sqrt{2}})^2-(2)^2$

$= > 4 - \frac{1}{2} - 4$

$= > -\frac{1}{2}$

Note: Dont trust your book answers!

Hope this helps!