Question

calculate the following:

1)sin 50 degree-sin 70 degree+sin 10deg.

2)cos square 48 deg.- sin square 12 deg.

3)tan 20 deg.+tan 40 deg.+root 3 tan 20 tan 40
Plz. Solve these

Answer 1

1. sin50 - sin70 + sin10 =
0.7660 - 0.9397 + 0.1736 = -0.0001.

2. cos^2(48) - sin^2(12) =
0.4477 - 0.0432 = 0.4045.

3. tan20 + tan40 + sqrt(3 )*tan20*tan40
= 0.3640 + 0.8391 + 0.5290 = 1.7321.

Answer 2

9
2