Question

VALUE OF SIN15 + COS 15

Answer 1

Answer:

sin(15) + cos(15) = sin(45 - 30) + cos(45- 30)

= sin(45)cos(30) - cos(45)sin(30) + cos(45)cos(30) + sin(45)sin(30)

= (1/√2)(√3/2) - (1/√2)(1/2) + (1/√2)(√3/2) + (1/√2)(1/2)

= (2/√2)(√3/2)

= √3/√2

= √6/2

Answer 2

Answer:

the value of cos15°-sin15°=√2cos60°

=1/√2