Question
In ∆ABC, AB = 5cm, BC = 6cm and AC = 10cm then find out the value of cos A?
From Cosine rule, we get BC2 = AB2 + AC2 - 2AB.AC.cos A 36=25+100-2×5×10×Cos A 100CosA=125-36=89 cos A = 89/100 .More Trigonometry Questions
- The minimum value of 12 sin θ + 5 cosθ is
- What is the simplified value of the given expression? 3(sin² 30° + sin² 60°) + 6sin 45° - (3sec 60° + cot 45°)
- If tan A = 1/√3, then what will be the value of sin⁴ A?
- If sin(A + B) = 1/2 and cos(A + 2B) = 1/√2, where 0° < A, B < 90°, then find the value of tan(2A).
- If tan 3.5θ x tan 6.5θ = 1 then the value of tan 5θ is
- Question 6
- If sec A + tan A = (9/4) and sec A - tan A = (4/9), find the value of cos A.
- If sin (4A − 5B) = (√2/2) and cos (A + B) = (√2/2), where 0° < A, B < 90°, then find the value of ‘A’.
- if a sin 45˚ = b cosec 60˚ then find the value of a⁴/b⁴
- Calculate the value of sec75o
Relevant for Exams:
Hey! Ask a query
Please enter email id
The email must be a valid email address.
Please enter Mobile Number
Please enter valid Mobile Number
Please enter your Doubt
Think You're Ready for RBI Grade B?
RBI Grade B 2026 Phase 1 Memory Based Paper
- 200 Questions with Detailed Solutions
- Section-wise Coverage (GA, English, Quant & Reasoning)