Please help?
1 Answer
Feb 19, 2018
Explanation:
#(1)#
#"given a triangle with 2 sides and the included angle then"#
#"area "=1/2 xxabxxsinC#
#"where a, b are the sides and C the included angle"#
#rArr"area "=1/2xx26xx30xxsin68^@#
#color(white)(rArr"area ")~~361.6" square m"#
#(2)#
#angleQRP=180^@-(37+98)^@=45^@#
#"to find p and r use the "color(blue)"sine rule"#
#color(red)(bar(ul(|color(white)(2/2)color(black)(p/(sinP)=q/(sinQ)=r/(sinR))color(white)(2/2)|)))#
#"where P, Q and R are the angles opposite sides"#
#"p, q and r"#
#rArrp/(sin98^@)=17/(sin37^@)larrcolor(blue)"cross multiply"#
#rArrp=(17xxsin98^@)/(sin37^@)~~27.97" to 2 dec. places"#
#color(blue)"Similarly"#
#r/(sin45^@)=17/(sin37^@)#
#rArrr=(17xxsin45^@)/(sin37^@)~~19.97" to 2 dec. places"#