Find the value of (4/3)tan ²30 ^o+ sin ²60 ^o–3 cos ²60 ^o+ (3/4) tan ² 60 ^o –2 tan ² 45 ^o .

30
Find the value of 4(sin ⁴30 ^o+ cos ⁴60 ^o)– 3(cos ²45 ^o+ sin ²90 ^o).
31
Prove that:

33
Determine whether the following equation is identity:

1

If cos A= 4/5, then the value of tan A is?