SarkariPYQ

SSC CGL 2018 PYQ — Question 51

SSC CGL Tier II Quant - 19/02/2018 • Quantitative Aptitude • Q51

Back to paper

What is the value of sin 75o + sin 15o?

Show answer & explanation

Correct answer: C

Explanation

The correct answer is option 3 i.e. √(3/2)          

We know that,

sinA + sinB = 2sin[(A + B)/2]cos[(A - B)/2

So,

sin 75o + sin 15o = 2 sin45o cos30o 

= 2 × 1/√2 × √3/2 = √3/√2