SSC CHSL Tier-1 previous year question
If cosA=5/13 and sinB=12/13, find sinA cosB + cosA sinB.
Asked in SSC CHSL Tier-1 (14 Nov 2025 Shift 2) · Quantitative Aptitude
Tap an option to check your answer.
Show answer and explanation
Correct answer: (A) 120/169
cosA=5/13→sinA=12/13; sinB=12/13→cosB=5/13. sinA cosB+cosA sinB = (12/13)(5/13)+(5/13)(12/13) = 60/169+60/169 = 120/169.
हिंदी में प्रश्न
यदि cosA = 5/13 और sinB = 12/13 तो sinA cosB + cosA sinB का मान ज्ञात करें।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 120/169
sinA=12/13, cosB=5/13। sinA cosB+cosA sinB = 60/169+60/169 = 120/169.
More solved Quantitative Aptitude questions
- If b − 1/b = 3, find b⁶ + 1/b⁶.
- A man walks up a moving-up escalator in 30s, and down the same escalator in 90s. How long to walk up when it's not moving?
- P,Q,R start a business. P (working partner) gets 2,000 monthly salary; remaining profit split by investment ratio (P:Q:R invested…
- CI amounts at end of 2nd and 3rd years are ₹4232 and ₹4655.20. Find the rate of interest.
- Sum of three numbers is 180. First:second=3:5, second:third=4:7. Find the second number.
- 4 boys and 3 girls (7 students) spend an average of ₹120 each. Boys' average is ₹150. Find girls' average.