if tan3x=sin45Xcos45+sin30find cosec3X

I'm sorry, but your question seems to be incomplete or incorrectly formulated. The equation "tan3x=sin45Xcos45+sin30" doesn't make sense in the context of trigonometry.

If you're trying to solve for x in a trigonometric equation, please make sure all terms are correctly written. For example, sin and cos should be followed by an angle or a variable representing an angle.

Also, the trigonometric functions sin45, cos45, and sin30 usually refer to sine and cosine of 45 degrees and 30 degrees respectively. If that's the case, these are known values: sin45 = cos45 = √2/2 and sin30 = 1/2.

Please provide the correct or complete version of your problem for me to be able to help you solve it.