Question

$\frac{1}{2}$
$\cos { }^{ - 1} ( \frac{1 - x}{1 + x} )$

is equal to
​

Answer 1

Answer:

Find the sum of the following arithmetic Progressions (−)/(+y), (3−2)/(+), (5−3)/(+), …

Step-by-step explanation:

(a) 17 = x + 7 (b) (t – 7) > 5 (c) 4/2 = 2 (d) (7 × 3) – 19 = 8 (e) 5 × 4 – 8 = 2x (f) x – 2 = 0 (g) 2m < 30 (h) 2n + 1 = 11 (i) 7 = (11 × 5) – (12 × 4) (j) 7 = (11 × 2 ) + p (k) 20 = 5y (l) 3p/2 < 5 (n) 20 – (10 – 5) = 3 × 5 (o) 7 – x = 5