Tan function is wrong

[Mohamed_Abd_El_Ghafa]

i use this block to calculate T on app inventor . and sure value of phi1 is 0.00033196 result shall be 0.00000011
but the wrong result is 0.0.0000000000336 why ?

[TIMAI2]

Try like this:

[Mohamed_Abd_El_Ghafa]

thank you very much ... it solved the problem . . ... i have to do same for sin and cos ?

[TIMAI2]

Yes (but test first to be sure)