Doubtly
@Doubtly · Joined Feb 2021
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- The sum of all values of θ ∈ (0, π/2) satisfying sin2 2θ + cos4 2θ = 3/4 is Your answer is here 2
- If 5(tan 2 x−cos 2 x)=2cos2x+9, then the value of cos4x is See the below image , 2
- Question and answer with APJ Abdul kalam | Q1 जब हम जानते हैं कि अंतरिक्ष अनंत है तो अंतरिक्ष की खोज का क्या उपयोग है? Ans } हम आपके ज्ञान का विस्तार करने के लिए जांच की भावना में अंत... 1
- Question and answer by Apj Abdul kalaam By Ajink Gupta Brainiak.in 1
- p and q are the points on the sides AB and AC respectively of a triangle ABC, Here is Your answer hit a like on answer thank you 2
- How do I get 200 plus marks in the JEE Main 2021? 200 is not too difficult in JEE Main. U just need to clarify your concepts. .200 means approximately 66 in each subject. Hardwork and clear... 1
- Solve the following equations by Cramer’s method i. 7x + 3y = 15; 12y - 5x = 39 Solving the folllowing equation with crammers method or rule solution of 1 Given: 7x+3y=15 ....(1) 12y-5x=39 ........(2) Equation (1) and (2... 2
- The kinetic energy needed to project a body of mass m from the earth surface (radius R) to infinity is V_(e= √(2gR) _______ Formula of Escape velocity) _( ).^(.). Kinetic Energy = 1over2mv_e²= 1over2m×2gR mgR option C is correct 1
- A person standing on the bank of the river observes that the angle of elevation of the top of a tree Let the height of the tree = h Let the width of the river =w Angle of elevation when standing on the bank = 60∘ When moved 40 m away from th... 1
- The diameter of a sphere is 6 cm. Find the total surface area of the sphere. (p = 3.14) diameter of sphere =d=6cm Radius = r=d/2 =6/2 =3cm the total surface area of sphere = 4 π r² =4 × 3.14 × 3² =4 × 3.14 × 9 =36 × 3.14 =113.04... 1
- Sides of a triangle are 7, 24 and 25. Determine whether the triangle is right-angled triangle or not By Pythagoras, if the sum of squares of two sides is equal to the square of the largest side then the triangle is said to be right-angled He... 1
- If a small block of mass m is placed gently on M when it is passing through its mean position. Answer: (a) A√(M/M+m) At the mean position the block M has its maximum speed v = Aω = A√(k/M) The small block m is placed gently (no horizon... 1
- In a transistor if increase in emitter current is 4 mA and corresponding increase in collector triangle I_E=4 \\ \\ \\ triangle I_c=3.5 \ \\α=triangle I_c over triangle I_E = 3.5over4=7over8 \\ \\ β= αover1-α=7over8over 1- 7over8=7 Hen... 1
- If two identical capacitor once connected in series (Ceq = C1) and once connected in parallel So Your answer is D c₁over c₂=1over4 1
- A pulley of radius 2 m is rotated about its axis by a force F =20t-5t2 newton Torque is given by τ = FR Or α = FR/I Given F =20t – 5t2 R = 2m, I = 10 kgm2 α = (20t-5t²)×2over 10 α = 4t – t 2 ω=∫_t²α dt=2t²-t³/3 at ω =0... 1
- A particle undergoes uniform circular motion. About which point on the plane of the circle, The force will pass through the centre of the circle. Therefore, the angular momentum will remain conserved at the centre of the circle. hen... 1
- Two-point masses of 0.3kg and 0.7kg are fixed at the ends of a rod which is of length Work-energy theorem, W_allforces= 1over2 Iw² Given: w is constant So required work done to be minimum implies that I must be minimum. Let th... 1
- all physics formulas {maharashtra board} read below pdf for all formulas from modern physics and shortcut files deleted edit01** 1