if in triangle ABC, a=4 , b=3, A=60degrees, then c is the root of the equation ______ (a) - Maths - Trigonometric Functions

Question

if in triangle ABC, a=4 , b=3, & A=60degrees,
then c is the root of the equation ______
(a) c2 - 3c -7=0 (b) c2 + 3c+7 =0 (c)
c2 - 3c + 7 =0
solve using trigonometric equations and property of triangle

Deepak Saxena · Accepted Answer

cosA = ( b2 + c2 - a2 ) /
2bc
1/2 = 9 + c2 - 16 / 2 * 3 * c
c2 - 3c - 7 = 0
hhence a

if in triangle ABC, a=4 , b=3, & A=60degrees, then c is the root of the equation ______ (a) c2 - 3c -7=0 (b) c2 + 3c+7 =0 (c) c2 - 3c + 7 =0 solve using trigonometric equations and property of triangle.....

if in triangle ABC, a=4 , b=3, & A=60degrees, then c is the root of the equation ______

(a) c² - 3c -7=0 (b) c²+ 3c+7 =0 (c) c² - 3c + 7 =0

solve using trigonometric equations and property of triangle.....