Exams › SSC CGL (Prelims) › General

Evaluate the expression cos^2 90 degrees + sin^2 30 degrees.

1. 3/4
2. 1/2
3. 1/4
4. 1

Correct answer: 1/4

Solution

Since cos 90 = 0 and sin 30 = 1/2, the expression equals 0^2 + (1/2)^2 = 0 + 1/4 = 1/4.

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