**Cos 60 Degrees**

### Can you find Kos (135 degrees + 60 degrees)? Then make it easy?

Kos (135 ° + 60)

= Because (135 °) Kos (60%) Sin (135 °) Sin (60%)

= (1/2) (1/2) (1/2) (3/2)

= 1/2 ÂˆÂš2 ÂˆÂš3 / 2Â ÂˆÂš2

= (1 + ÂÂš3) / (2Â ÂˆÂš2)

Cass (195 °) = (1 + Â ± 3) / (2 Â Â Â 2)

کوس (135 + 60)

Sin (135) Sin (135) Sin (135) Sin (60)

(1/2) (Route 2/2) (Route 2/2) (Route 3/2)

(Route 2 Route 6) / 4

= 0.9659258262891