![If sin alpha + sin beta = a and cos alpha + cos beta = b, show that cos (alpha + beta ) = b^2 - a^2b^2 + a^2 If sin alpha + sin beta = a and cos alpha + cos beta = b, show that cos (alpha + beta ) = b^2 - a^2b^2 + a^2](https://haygot.s3.amazonaws.com/questions/1410367_1664496_ans_0b1fb2b3811b4b359d0ad6fd0e8cf14b.jpg)
If sin alpha + sin beta = a and cos alpha + cos beta = b, show that cos (alpha + beta ) = b^2 - a^2b^2 + a^2
![Amyloid beta: structure, biology and structure-based therapeutic development | Acta Pharmacologica Sinica Amyloid beta: structure, biology and structure-based therapeutic development | Acta Pharmacologica Sinica](https://media.springernature.com/lw685/springer-static/image/art%3A10.1038%2Faps.2017.28/MediaObjects/41401_2017_Article_BFaps201728_Fig2_HTML.jpg)
Amyloid beta: structure, biology and structure-based therapeutic development | Acta Pharmacologica Sinica
If alpha ,beta are the roots of the equation ax^2 + bx + c = 0 , then the value of 1/aalpha+b + 1/abeta+b is
36. If sin alpha + sin beta is equal to a and cos alpha + cos beta is equal to b then find value of cos alpha + beta and sin alpha + beta
![Let alpha and beta be the roots of equation x^2 - 6x - 2 = 0 . If an = alpha^n - beta^n , for n≥ 1 , then the value of a10-2a_82a9 is equal to? Let alpha and beta be the roots of equation x^2 - 6x - 2 = 0 . If an = alpha^n - beta^n , for n≥ 1 , then the value of a10-2a_82a9 is equal to?](https://haygot.s3.amazonaws.com/questions/1562679_1735637_ans_0ab89ed4c67a450bbbfcd9bda3f6eb14.jpg)