Question

Without using tables find the value of (a) sin 75 (b) tan 105​

Answer 1

Answer:

DOnt know

Step-by-step explanation:

Answer 2

Answer:

sin(45+30)= √3+1 / 2√2

Step-by-step explanation:

a) sin75

sin(45+30)

using sin(A+B)=sinAcosB+cosAsinB

sin(45+30)=sin45cos30+cos45sin30

sin(45+30)= (1/√2)(√3/2)+(1/√2)(1/2)

sin(45+30)=√3/2√2 + 1/2√2

sin(45+30)= √3+1 / 2√2