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(cos13°+sin 13°) /(cos13°-sin13°) [(cos13°+sin 13°)/cos13°] /[(cos13°-sin13°)/cos13°] =(1+tan13°)/ (1-tan13°) Put tan 45° in place of 1. =(tan45°+tan13°)/(1-tan13°×tan45°) Using the tangent addition formula: tan(a+b) =(tanA+tanB)/ (1-tanA.tanB) =tan (45°+13°) =tan (58°)
The average age of A and B is 17 years. If A is to be replaced by C, the average would be 16 years. The average age of C and A is 18 years. Find the age...
The average age of 20 children and their teacher's age are 18 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
The average of 27 numbers is 25.The average of first 13 numbers is 16 and that of the last 13 numbers is 19. What will be the 27th number?
The average age of 26 children and their teacher's age are 22 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
The average age of three children is 20 years. If their ages are in the ratio 3:5:7. Find the age of the youngest child.
Rohit Sharma scores 93 runs in his 23rd inning, due to this his average increased by 3 runs. Find his current average?
Mixture X comprises juice and water in a 5:4 ratio, and mixture Y consists of juice and water in a 7:9 ratio. When mixture X is combined with mixture Y,...
A number is such that when it is multiplied by 5, it gives another number which is as much above from 210 as the original number (itself) is below 210. ...
Average 20 numbers is ‘x’. If the average of first 12 numbers is 62.5 while average of last 5 numbers is 74.8 and 13th, 14th a...
