If cos theta= 24/25, what are two possible values of sin theta

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125

We just started the introduction into circles and i have no idea how to do this.