Hi

Looking for a pointer on where Im going wrong:

2sec^{2}x – 5tanx – 5

2 (tan^{2}x + 1) – 5tanx – 5

2tan^{2}x – 5tanx -3

tanx = k

2k^{2}-5k-3

5+/-sqrt4 – 4.2.-3 / 4 = 2.573 or -0.073

tanx = 2.573 tanx = 0.0073

x = 68.76 x= 4.175

textbook saying should be 30 and 150