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Start learning 50% faster. Sign in nowcos120° = cos (180°-60°) from cos(A-B) = cosA. cosB- sinA.sinB so cos180°.cos60°-sin 180°.sin60° =-1.1/2 -0. √3/2 =-1/2= -.5
One-fourth of a number is 70. What will 40% of that number?
...Bhawna won 3/5 of the marbles that were there at the beginning of the game. Ravi won 2/3 of the remaining marbles while Sunny won the remaining 80 marbl...
What is the ratio of the sum of the squares of the first 8 natural numbers to the sum of the first 12 odd natural numbers?
A lending library has a fixed charge for the first 7 days and an additional charge for each day thereafter. Sahil paid Rs . 215 for a book kept for 15 ...
