Question

evaluate the following question using trigonometric table.​

Answer 1

Answer:

9/4

Step-by-step explanation:

1+

$1 + \cos {}^{2} (30) + \cos {}^{2} (60) + \cos {}^{2} (90)$

$1 + ( \sqrt{3} \div 2) {}^{2} +(1 \div \sqrt{2} ) {}^{2} + 0$

1+(3/4)+(1/2)

=9/4

hope it helps