2019年6月9日 · Answer: Step-by-step explanation: cos(x-y)=-1. cos(x-y)=cosπ (because cos 180 i.e,π=-1 value) therefore, cos(x-y)=cos π

2019年8月21日 · Answer: Cos(x + y)Cos(x - y) = Cos²y - Sin²x. Step-by-step explanation: Cos(x + y)Cos(x - y) = Cos²y - Sin²x ...

The maximum value of cosx+cosy+cos(x+y) = 3 and minimum value = -1. Step-by-step explanation: We know that the cos function attains its minimum value as -1 at radians. So, x = y = x+y = Now, we can write as; This is the min value of cos(x+y). Thus, the minimum value of cos x + cos y + cos (x+y) = -1 + (-1 )+1=-1

2020年6月13日 · Answer: y = (cos x)^x. Taking natural log on both sides, ln y = x ln cos x. Now, differentiating both sides wrt x. We get,

2021年12月6日 · The expansion of cos x cos y in powers of x and y gives us an approximate value cos x cos y = 1 - x^2/2 - y^2/2 + x^4/24 + x^2y^2/4 + y^4/24 + ... Step-by-step explanation: The expansion of cos x cos y in powers of x and y can be obtained using the Taylor series expansion of cosine.

2024年9月26日 · PART B (10 x 10 = 100MARKS) (Answer any 10 / किसी 10 प्रश्नों के उत्तर दें) Q.24 A can do a piece of work in 25 days and B can finish it in 20 days. T … hey work together for 5 days and then A goes away. In how …

2020年4月12日 · find the common solution of equation X + Y = 0 and X - Y = 0 x²-3, 2x⁴+3x³-2x²-9x-5 Find solutions of the form x = a, y = 0 and x = 0, y = b for the following pairs of equations.

2019年9月17日 · Identify any outlier(s) in the following set. 61.4, 52.9, 12.6, 51.5, 90.9, 42.2 Question content area bottom Part 1 If an outlier occurs more tha …

2023年8月12日 · Is 3x² + - + 2x² y - 4y² the degree xy of the expression. 2 a polynomial? If yes, find

2022年6月6日 · >>Prove geometrically that cos( x + y) = c. Question. Bookmark. Prove geometrically that cos(x+y)=cosxcosy−sinxsiny. Medium. Solution. verified. Verified by Toppr. Let us take a circle of radius one and let us take 2 points P and Q such that P is at an angle x and Q at an angle y. as shown in the diagram