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In: Math

Simplify. Do not give trig values. 1) 2 sin40 cos 40 2) 10 sin 18 cos...

Simplify. Do not give trig values.

1) 2 sin40 cos 40
2) 10 sin 18 cos 18
3) (tan 22)^2
4) 2 (cos 37)^2 - 1
5) (cos 29)^2 - 1
6) (sin 33)^2 + (cos 33)^2
7) (sin 38)^2 - (cos 38)^2
8) cos 67 cos 31 + sin 67 sin 31

9) cos 81 cos 53 - sin 81 sin 53
10) cos 46 / sin 46
11) sin 50 / cos 40
12) sin 44 cot 44
13) 4 (sin 31)^2 (cos 31)^2 "think double angle"
14) sin 38 + cos 38
15) sin 40 + cos 32 "sum to product rule"
16) sin 53 cos 67 "product to sum rule"

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