Home›MPPSC Forest›State Forest Service Mains Exam›Section 'B': Forestry and General Science›UNIT-10: Elementary Mathematics and General Mental Ability›Circular measure, definitions of trigonometric ratio, simple problems on height and distance›If cot θ = 7/8 ; value of (1 + sin θ)(1 - sin θ) / (1 + cos θ)(1 -

If cot θ = 7/8 ; value of (1 + sin θ)(1 - sin θ) / (1 + cos θ)(1 - cos θ) is

20243M#mppsc-forest#pyq#mcq#2024
A.21/24
B.35/48
C.49/64Correct
D.49/58
Explanation & Solution

Correct Answer: (C) 49/64

Given cot θ = 7/8, the expression (1 + sin θ)(1 - sin θ) / (1 + cos θ)(1 - cos θ) simplifies to (1 - sin²θ) / (1 - cos²θ) = cos²θ / sin²θ = cot²θ. Substituting cot θ gives (7/8)² = 49/64.

हिंदी में प्रश्न एवं आदर्श उत्तर

यदि cot θ = 7/8 ; (1 + sin θ)(1 - sin θ) / (1 + cos θ)(1 - cos θ) का मान है

A.21/24
B.35/48
C.49/64सही
D.49/58

सही उत्तर: (C) 49/64

दिया गया है cot θ = 7/8, व्यंजक (1 + sin θ)(1 - sin θ) / (1 + cos θ)(1 - cos θ) सरल होकर (1 - sin²θ) / (1 - cos²θ) = cos²θ / sin²θ = cot²θ बनता है। cot θ का मान रखने पर (7/8)² = 49/64 प्राप्त होता है।

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