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# how to evaluate certain trig functions!?? watch

1. as the title says... how would I input sin^0.5 0.174 into a calculator?
The question is to integrate, using the trapezium rule: - sin ^0.5 x .dx with 6 intervals of equal width. The boundaries are pi/2 and pi/6. Now, I have setted up a table, but dont know how to substitute the x value into sin^0.5 x???

Mathemagician
2. (Original post by Mathemagician)
as the title says... how would I input sin^0.5 0.174 into a calculator?
The question is to integrate, using the trapezium rule: - sin ^0.5 x .dx with 6 intervals of equal width. The boundaries are pi/2 and pi/6. Now, I have setted up a table, but dont know how to substitute the x value into sin^0.5 x???

Mathemagician
do you just mean sq. root of sinx...if so, first calculate sinx and sq root the answer
3. no, its in the heinemann book P2, page 140 Ex. 7C question 3
4. when you say sin^0.5 x that is basically the square root of sin x....

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