Question

(Cos0°+cos45°+sin30°)(sin90°-cos45°+cos60°)

Answer 1

Answer:

Explanation:

______________________

We know the values of

i) cos0° = 1

ii) sin45° =  

iii) sin30° =  

iv) sin90° = 0

v) cos45° =  

vi ) cos60° =  

_____________________

Now,

The value of

(cos 0+sin 45+sin 30)(sin 90-cos 45+cos 60)

=  

=  

=  

/* By algebraic identity

(a-b)(a+b) = a²-b² */

=  

=  

=

Answer 2

Answer is 1 . I hope it helps you