Find the all the angles of a triangle with side lengths of 8cm, 11cm and 11cm.
Using the knowledge of a2 = b2 + c2 - 2bcCos(A)
Rearrange to aquire Cos(A) = (b2 + c2 - a2)/2bc
Then input the values to obtain the angles of 42, 69, 69.
AJ
Related Maths A Level answers
All answers ▸Integrate y=(x^2)cos(x) with respect to x.
How do you find the stationary points of the curve with equation y=4x^3-12x+1
The polynomial p(x) is given by p(x) = x^3 – 5x^2 – 8x + 48 (a) (i) Use the Factor Theorem to show that x + 3 is a factor of p(x). [2 marks] (ii) Express p(x) as a product of three linear factors. [3 marks]
(4-2x)/(2x+1)(x+1)(x+3) = A/(2x+1)+B/(x+1)+C(x+3) Find the values of the constants A, B and C