Question

6 tan² delta-6/cos² delta​

Answer 1

$- 6$

Step-by-step explanation:

$6tan^{2} \delta - \frac{6}{cos ^{2} \delta } = 6tan^{2} \delta - 6sec^{2} \delta \\ = - 6(sec^{2} \delta -tan^{2} \delta ) = - 6 \times 1 = - 6$