Question

UCTION TO TRIGONOMETKY
EXERC
Evaluate the following:
(1) sin 60° cos 30° + sin 30° cos 60°
cos 45º
(ii) sec 30° + cosec 30°​

Answer 1

sin 60=√3/2

cos 30=√3/2

sin 30=1/2

cos60=1/2

cos 45=1/√2

sec 30=2/√3

cosec 30=2

1- (√3/2)×(√3/2)+1/2×1/2

3/4+1/4=4/4=1

(ii)- 2/√3+2=(2+2√3)√3