1. If in Δ ABC, LA-90°, a 25 cm, b-7cm, thenwrite all the trigonomet

1.	1. If in Δ ABC, LA-90°, a 25 cm, b-7cm, thenwrite all the trigonometric ratios for ZBand 2C
Answer» if angle A is = 90° , then using Pythagoras theorem a² = b²+c² => c² = a²-b² = (25)²-(7)² = 625-49= 574 => c = 24cm now, assuming angle c is at base so, cosC = 7/25 , sinC = 24/25 , tanC = 24/7 similarly cosB = 24/25, sinB = 7/25 , tanB = 7/24

1. If in Δ ABC, LA-90°, a 25 cm, b-7cm, thenwrite all the trigonometric ratios for ZBand 2C

Answer»

if angle A is = 90° , then using Pythagoras theorem

a² = b²+c²

=> c² = a²-b² = (25)²-(7)² = 625-49= 574 => c = 24cm

now, assuming angle c is at base

so, cosC = 7/25 , sinC = 24/25 , tanC = 24/7

similarly cosB = 24/25, sinB = 7/25 , tanB = 7/24