1.

If cos A=45 and cos B=1213,3π2<A,B<2π, find the value of the following (i) cos(A+b) (ii) sin(A−B)

Answer»

If cos A=45 and cos B=1213,3π2<A,B<2π, find the value of the following

(i) cos(A+b)

(ii) sin(AB)



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