![find the value of the expression cos4 pi /8+cos4 3pi /8+cos4 5pi /8+cos4 7pi /8 - Maths - Principle of Mathematical Induction - 10954413 | Meritnation.com find the value of the expression cos4 pi /8+cos4 3pi /8+cos4 5pi /8+cos4 7pi /8 - Maths - Principle of Mathematical Induction - 10954413 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/userimages/mn_images/image/14Mar2011-8-1.png)
find the value of the expression cos4 pi /8+cos4 3pi /8+cos4 5pi /8+cos4 7pi /8 - Maths - Principle of Mathematical Induction - 10954413 | Meritnation.com
![What are the values of cos A - sin A and tan A + cot A when A has the values1. dfrac {pi}{3}, 2. dfrac {2pi}{3}, 3. dfrac {5pi}{4}, 4. dfrac {7pi}{4} and 5. dfrac {11pi}{3}. What are the values of cos A - sin A and tan A + cot A when A has the values1. dfrac {pi}{3}, 2. dfrac {2pi}{3}, 3. dfrac {5pi}{4}, 4. dfrac {7pi}{4} and 5. dfrac {11pi}{3}.](https://search-static.byjusweb.com/question-images/toppr_invalid/questions/1591161_1730826_ans_fe24c159cc5641c2aca0b6785efdc181.jpg)
What are the values of cos A - sin A and tan A + cot A when A has the values1. dfrac {pi}{3}, 2. dfrac {2pi}{3}, 3. dfrac {5pi}{4}, 4. dfrac {7pi}{4} and 5. dfrac {11pi}{3}.
![find the value of the expression cos4 pi /8+cos4 3pi /8+cos4 5pi /8+cos4 7pi /8 - Maths - Principle of Mathematical Induction - 10954413 | Meritnation.com find the value of the expression cos4 pi /8+cos4 3pi /8+cos4 5pi /8+cos4 7pi /8 - Maths - Principle of Mathematical Induction - 10954413 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/userimages/mn_images/image/14Mar2011-8-2.png)