Question

cos56
+ sin? 30° + cos? 30°.
sin 340
cos 56
+ sin? 30° + cos? 30°
sin 340
sin (90
+ sin 30° + cos2 30°
sin 34°
[cos 0 = sin (90 - 0)]
sin
+ sin? 30° + cos2 30°
sin 340
4​

Answer 1

Answer:

tan60∘−tan30∘1+tan60∘⋅tan30∘=tan30∘

Step-by-step explanation:

cos60∘⋅cos30∘−sin60∘⋅sin30∘=cos90∘  

cos60∘=1−2sin230∘=2cos230∘−1

tan60∘−tan30∘1+tan60∘⋅tan30∘=tan30∘