结果1 题目 In a triangle ABC, is true relationship c is less than b, and b is less than a. Internal angles of the triangle are in the ratio 5:4:9. The size of the internal angle bet a is: 相关知识点: 试题来源: 解析 x=(180)/(5+4+9)=10° ⊙ 反馈 收藏 ...
In a triangle ABC, angle A = 60 degrees, angle B = 70 degrees. What is the measure of angle C? A. 50 degrees B. 60 degrees C. 70 degrees D. 80 degrees 相关知识点: 试题来源: 解析 A。三角形内角和是 180 度,已知角 A 和角 B 的度数,那么角 C 的度数为 180 - 60 - 70 =...
In a triangle ABC, a^3 + b^3 + c^3 = c^2 (a + b + c) (All symbol used have usual meaning in a triangle.) Statement-1: The value of /C=60^@. Statement-2: Delta
Q2 In a triangle ABC,a3cos(B−C)+b3cos(C−A)+c3cos(A−B)= View Solution Q3 a3cos(B−C)+b3cos(C−A)+c3cos(A−B)=3abc View Solution Q4 In a triangle ABC,a3cos(B−C)+b3cos(C−A)+c3cos(A−B)= View Solution Q5 In a triangle ABC, a3cos(...
In a triangleABC,angleA=90^@,AB=5cm and AC=12cm.If AD|BCthen the value of AD will be a)60/13 cm b)1/60cm c)13/2cm d)(2sqrt12)/13 cm
In a triangle ABC, the points D, E and F are the midpoints of AB, BC and CA respectively. Point P lies in the plane of the triangle. By setting , and , show that . 答案 so Similarly and Hence 相关推荐 1In a triangle ABC, the points D, E and F are the midpoints of A...
In a triangle ABC, b=203 mm, c=158 mm, B=94^(° )12'. Calculate the values of a, A, C and find the area of the triangle. 相关知识点: 试题来源: 解析 a=116.4, A=34^(° )53', C=50^(° )55'. Δ =9172 mm2反馈 收藏 ...
In a triangle ABC, if a,b,c are the sides opposite to angles A, B, C respectively, then the value of ∣∣∣∣bcosCaccosBccosAbacosCacosBcbcosA∣∣∣∣ is A 1 B −1 C 0 D acosA+bcosB+ccosC Video SolutionStruggling With Determinants? Get Allen’s Free One Shot Videos Free ALLE...
Answer to: In a triangle, ABC, E, and F are the mid-points of AC and AB respectively. The altitude AP to BC intersects EF at Q. Prove that AQ= PB...
In a triangle ABC, Prove that:sin3A+sin3B+sin3C=3cosA2cosB2cosC2+cos(3A)2cos(3B)2cos(3C)2 View Solution In a triangle ABC,cos3A+cos3B+cos3C=1and∠A+∠B<∠C, then find possible measure of∠C. View Solution In a triangle ABC, cos 3A + cos 3B + cos 3C = 1 , then then...