Question

in traingle ABC, right-angled at B, if tan A = 1/√3, find the value of cos A cos C - sin A sin C​

Answer 1

Answer:

0

Step-by-step explanation:

tan theta = perpendicular/base

given; tan A=1/root 3

so AB=ROOT 3

    BC=1

by pythagorus theorm

AC=2

cos theta= base/hyp

cos A= root 3/2    ......1

cos C=1/2          ........2

sin theta= perpendicular/hyp

sin A= 1/2       ......3

sin C=root 3/2       ......4

from 1,2,3 and 4

cosA cosC =root 3/4

sinA sinC =root 3/4

cosAcosC-sinAsinC=0

Answer 2

Answer:

0

Step-by-step explanation: